ICU-21108 Update to use/support VS2019, and add extra CI builds for VS2017 and VS2019.

Change to use the Windows 10 SDK for Win32 (Win7) builds on the VS2019 ADO images.
The Windows 10 SDK is backwards compatible to Windows 7, if WINVER and
_WIN32_WINNT are set before compiling.

Clean up the vcxproj files from VC7.1
diff --git a/.ci-builds/.azure-pipelines.yml b/.ci-builds/.azure-pipelines.yml
index 9e5e37c..9669a65 100644
--- a/.ci-builds/.azure-pipelines.yml
+++ b/.ci-builds/.azure-pipelines.yml
@@ -96,11 +96,13 @@
         CC: clang
         CXX: clang++
 #-------------------------------------------------------------------------
+# VS 2019 Builds
+#-------------------------------------------------------------------------
 - job: ICU4C_MSVC_x64_Release_Distrelease
-  displayName: 'C: MSVC 64-bit Release (VS 2017) + Distrelease'
+  displayName: 'C: MSVC 64-bit Release (VS 2019) + Distrelease'
   timeoutInMinutes: 30
   pool:
-    vmImage: 'vs2017-win2016'
+    vmImage: 'windows-2019'
     demands: 
       - msbuild
       - visualstudio
@@ -134,10 +136,10 @@
         ArtifactName: '$(Build.BuildNumber)_ICU4C_MSVC_x64_Release'
 #-------------------------------------------------------------------------
 - job: ICU4C_MSVC_x86_Release_Distrelease
-  displayName: 'C: MSVC 32-bit Release (VS 2017) + Distrelease'
+  displayName: 'C: MSVC 32-bit Release (VS 2019) + Distrelease'
   timeoutInMinutes: 30
   pool:
-    vmImage: 'vs2017-win2016'
+    vmImage: 'windows-2019'
     demands: 
       - msbuild
       - visualstudio
@@ -152,6 +154,11 @@
         solution: icu4c/source/allinone/allinone.sln
         platform: Win32
         configuration: Release
+    - task: BatchScript@1
+      displayName: 'Run Tests (icucheck.bat)'
+      inputs:
+        filename: icu4c/source/allinone/icucheck.bat
+        arguments: 'x86 Release'
     - task: PowerShell@2
       displayName: 'PowerShell: Distrelease script (x86)'
       inputs:
@@ -166,10 +173,10 @@
         ArtifactName: '$(Build.BuildNumber)_ICU4C_MSVC_x86_Release'
 #-------------------------------------------------------------------------
 - job: ICU4C_MSVC_x64_ARM32_ARM64_Release_Distrelease
-  displayName: 'C: MSVC x64 ARM32 ARM64 Release (VS 2017) + Distrelease ARM64'
+  displayName: 'C: MSVC x64 ARM32 ARM64 Release (VS 2019) + Distrelease ARM64'
   timeoutInMinutes: 60
   pool:
-    vmImage: 'vs2017-win2016'
+    vmImage: 'windows-2019'
     demands: 
       - msbuild
       - visualstudio
@@ -209,8 +216,35 @@
         PathtoPublish: 'icu4c/source/dist/icu-windows.zip'
         ArtifactName: '$(Build.BuildNumber)_ICU4C_MSVC_ARM64_Release'
 #-------------------------------------------------------------------------
-- job: ICU4C_MSVC_x64_Release_DataFilter
-  displayName: 'C: MSVC 64-bit Release DataFilter (VS 2017)'
+- job: ICU4C_MSVC_x64_Debug
+  displayName: 'C: MSVC 64-bit Debug (VS 2019)'
+  timeoutInMinutes: 30
+  pool:
+    vmImage: 'windows-2019'
+    demands: 
+      - msbuild
+      - visualstudio
+      - Cmd
+  steps:
+    - checkout: self
+      lfs: true
+      fetchDepth: 1
+    - task: VSBuild@1
+      displayName: 'Build Solution'
+      inputs:
+        solution: icu4c/source/allinone/allinone.sln
+        platform: x64
+        configuration: Debug
+    - task: BatchScript@1
+      displayName: 'Run Tests (icucheck.bat)'
+      inputs:
+        filename: icu4c/source/allinone/icucheck.bat
+        arguments: 'x64 Debug'
+#-------------------------------------------------------------------------
+# VS 2017 Builds
+#-------------------------------------------------------------------------
+- job: ICU4C_MSVC_x64_Release
+  displayName: 'C: MSVC 64-bit Release (VS 2017)'
   timeoutInMinutes: 30
   pool:
     vmImage: 'vs2017-win2016'
@@ -222,17 +256,17 @@
     - checkout: self
       lfs: true
       fetchDepth: 1
-    - powershell: |
-        $filterPath = $Env:BUILD_SOURCESDIRECTORY + "\.ci-builds\data-filter.json"
-        $vstsCommandString = "vso[task.setvariable variable=ICU_DATA_FILTER_FILE]" + $filterPath
-        Write-Host "##$vstsCommandString"
     - task: VSBuild@1
-      displayName: 'Build Solution with Data Filter'
+      displayName: 'Build Solution'
       inputs:
         solution: icu4c/source/allinone/allinone.sln
         platform: x64
         configuration: Release
-        msbuildArgs: '/p:SkipUWP=true'
+    - task: BatchScript@1
+      displayName: 'Run Tests (icucheck.bat)'
+      inputs:
+        filename: icu4c/source/allinone/icucheck.bat
+        arguments: 'x64 Release'
 #-------------------------------------------------------------------------
 - job: ICU4C_MSVC_x86_Debug
   displayName: 'C: MSVC 32-bit Debug (VS 2017)'
diff --git a/icu4c/source/allinone/Build.Windows.PlatformToolset.props b/icu4c/source/allinone/Build.Windows.PlatformToolset.props
index b477767..5f600c8 100644
--- a/icu4c/source/allinone/Build.Windows.PlatformToolset.props
+++ b/icu4c/source/allinone/Build.Windows.PlatformToolset.props
@@ -1,16 +1,22 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!-- Copyright (C) 2016 and later: Unicode, Inc. and others. License & terms of use: http://www.unicode.org/copyright.html -->
 <Project DefaultTargets="Build" ToolsVersion="14.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <!-- This file is used to set the PlatformToolset configuration option for all UWP projects. -->
-  
+  <!-- This file is used to set configuration option for all projects. -->
+
   <!-- Automatic PlatformToolset version selection. -->
-  <!-- If there is no DefaultPlatformToolset set, we will detect the version based on version of the build tools. -->
+  <!-- If there is no DefaultPlatformToolset set, we will try to detect the version based on version of the build tools. -->
   <PropertyGroup>
     <BuildToolVersion>$(VisualStudioVersion)</BuildToolVersion>
-    <BuildToolVersion Condition="'$(BuildToolVersion)'==''">$(MSBuildToolsVersion)</BuildToolVersion>
-    <!-- Note: v140 is the Visual Studio 2015 toolset. v141 is the Visual Studio 2017 toolset. -->
+    <!-- Only use the MSBuildToolsVersion if we don't have the VisualStudioVersion and MSBuildToolsVersion is set to something other than Current. -->
+    <BuildToolVersion Condition="'$(BuildToolVersion)'=='' and '$(MSBuildToolsVersion)' != 'Current'">$(MSBuildToolsVersion)</BuildToolVersion>
+    <!-- Note:
+      v140 is the Visual Studio 2015 toolset. (14.0)
+      v141 is the Visual Studio 2017 toolset. (15.0)
+      v142 is the Visual Studio 2019 toolset. (16.0)
+    -->
     <AutoDetectedPlatformToolset Condition="'$(BuildToolVersion)'=='14.0'">v140</AutoDetectedPlatformToolset>
     <AutoDetectedPlatformToolset Condition="'$(BuildToolVersion)'=='15.0'">v141</AutoDetectedPlatformToolset>
+    <AutoDetectedPlatformToolset Condition="'$(BuildToolVersion)'=='16.0'">v142</AutoDetectedPlatformToolset>
   </PropertyGroup>
   <PropertyGroup Label="EmptyDefaultPlatformToolset">
     <DefaultPlatformToolset Condition=" '$(DefaultPlatformToolset)' == '' ">$(AutoDetectedPlatformToolset)</DefaultPlatformToolset>
@@ -18,9 +24,36 @@
   <PropertyGroup Label="PlatformToolset">
     <PlatformToolset>$(DefaultPlatformToolset)</PlatformToolset>
   </PropertyGroup>
+
+  <!-- This is the default SDK target. -->
+  <!--
+    If not already set, use the latest installed version of the Windows 10 SDK.
+    The Windows 10 SDK is backwards compatible to Windows 7, as long as WINVER and _WIN32_WINNT are set before compiling.
+    Note:
+      - With VS2019, using a value of "10.0" means that it will use the latest installed version.
+      - With VS2017, we need to manually detect the latest SDK version from the registry.
+      - With VS2015, use the Windows 8.1 SDK.
+  -->
+  <PropertyGroup Condition="'$(WindowsTargetPlatformVersion)'=='' and '$(PlatformToolset)'=='v142'">
+    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(WindowsTargetPlatformVersion)'=='' and '$(PlatformToolset)'=='v141'">
+    <!-- Detect the SDK version. -->
+    <WindowsSdkInstallFolder_10 Condition="'$(WindowsSdkInstallFolder_10)' == ''">$(Registry:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SDKs\Windows\v10.0@InstallationFolder)</WindowsSdkInstallFolder_10>
+    <WindowsSdkInstallFolder_10 Condition="'$(WindowsSdkInstallFolder_10)' == ''">$(Registry:HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Microsoft SDKs\Windows\v10.0@InstallationFolder)</WindowsSdkInstallFolder_10>
+    <WindowsTargetPlatformVersion_10 Condition="'$(WindowsTargetPlatformVersion_10)' == ''">$(Registry:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SDKs\Windows\v10.0@ProductVersion)</WindowsTargetPlatformVersion_10>
+    <WindowsTargetPlatformVersion_10 Condition="'$(WindowsTargetPlatformVersion_10)' == ''">$(Registry:HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Microsoft SDKs\Windows\v10.0@ProductVersion)</WindowsTargetPlatformVersion_10>
+    <!-- Sometimes the version in the registry has the '.0' suffix, and sometimes it doesn't. Check and add it. -->
+    <WindowsTargetPlatformVersion_10 Condition="'$(WindowsTargetPlatformVersion_10)' != '' and !$(WindowsTargetPlatformVersion_10.EndsWith('.0'))">$(WindowsTargetPlatformVersion_10).0</WindowsTargetPlatformVersion_10>
+    <!-- Set the default. -->
+    <WindowsTargetPlatformVersion>$(WindowsTargetPlatformVersion_10)</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <PropertyGroup Condition="'$(WindowsTargetPlatformVersion)'=='' and '$(PlatformToolset)'=='v140'">
+    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
+  </PropertyGroup>
+  <!-- Disable MSBuild warning about Linker OutputFile. -->
   <PropertyGroup>
-    <!-- Disable MSBuild warning about Linker OutputFile. -->
-    <!-- Ex: MSBuild complains that the common project creates "icuuc62.dll" rather than "common.dll". However, this is intentional. -->
+    <!-- For example: MSBuild complains that the common project creates "icuuc62.dll" rather than "common.dll". However, this is intentional. -->
     <MSBuildWarningsAsMessages>MSB8012</MSBuildWarningsAsMessages>
   </PropertyGroup>
 </Project>
diff --git a/icu4c/source/allinone/Build.Windows.ProjectConfiguration.props b/icu4c/source/allinone/Build.Windows.ProjectConfiguration.props
index ab53588..147689b 100644
--- a/icu4c/source/allinone/Build.Windows.ProjectConfiguration.props
+++ b/icu4c/source/allinone/Build.Windows.ProjectConfiguration.props
@@ -56,13 +56,7 @@
     <IcuBinOutputDir>binARM64</IcuBinOutputDir>
     <IcuLibOutputDir>libARM64</IcuLibOutputDir>
   </PropertyGroup>
-  <!-- This is the default SDK target. -->
-  <PropertyGroup>
-    <!-- Note that the Windows 8.1 SDK is backwards compatible down-level to Windows 7, so
-         setting this to 8.1 does not actually imply targeting Windows 8.1. -->
-    <WindowsTargetPlatformVersion>8.1</WindowsTargetPlatformVersion>
-  </PropertyGroup>
-  <!-- Desktop ARM/ARM64 support requires a newer version of the Windows SDK than 8.1 -->
+  <!-- Desktop ARM/ARM64 support requires a different version of the Windows SDK -->
   <!--
       Note: This version must match the version below in the ARM64 section for AdditionalLibraryDirectories
   -->
diff --git a/icu4c/source/allinone/Build.Windows.UWP.ProjectConfiguration.props b/icu4c/source/allinone/Build.Windows.UWP.ProjectConfiguration.props
index 359d2c2..89d528a 100644
--- a/icu4c/source/allinone/Build.Windows.UWP.ProjectConfiguration.props
+++ b/icu4c/source/allinone/Build.Windows.UWP.ProjectConfiguration.props
@@ -8,18 +8,8 @@
     <ApplicationType>Windows Store</ApplicationType>
     <ApplicationTypeRevision>10.0</ApplicationTypeRevision>
   </PropertyGroup>
-  <!-- If not already set, then we will default to using the latest installed Windows 10 SDK version. -->
-  <PropertyGroup Condition="'$(WindowsTargetPlatformVersion)'==''">
-    <!-- Detect the SDK version. -->
-    <WindowsSdkInstallFolder_10 Condition="'$(WindowsSdkInstallFolder_10)' == ''">$(Registry:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SDKs\Windows\v10.0@InstallationFolder)</WindowsSdkInstallFolder_10>
-    <WindowsSdkInstallFolder_10 Condition="'$(WindowsSdkInstallFolder_10)' == ''">$(Registry:HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Microsoft SDKs\Windows\v10.0@InstallationFolder)</WindowsSdkInstallFolder_10>
-    <WindowsTargetPlatformVersion_10 Condition="'$(WindowsTargetPlatformVersion_10)' == ''">$(Registry:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SDKs\Windows\v10.0@ProductVersion)</WindowsTargetPlatformVersion_10>
-    <WindowsTargetPlatformVersion_10 Condition="'$(WindowsTargetPlatformVersion_10)' == ''">$(Registry:HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Microsoft SDKs\Windows\v10.0@ProductVersion)</WindowsTargetPlatformVersion_10>
-    <!-- Sometimes the version in the registry has the '.0' suffix, and sometimes it doesn't. Check and add it. -->
-    <WindowsTargetPlatformVersion_10 Condition="'$(WindowsTargetPlatformVersion_10)' != '' and !$(WindowsTargetPlatformVersion_10.EndsWith('.0'))">$(WindowsTargetPlatformVersion_10).0</WindowsTargetPlatformVersion_10>
-    <!-- Set the default. -->
-    <WindowsTargetPlatformVersion>$(WindowsTargetPlatformVersion_10)</WindowsTargetPlatformVersion>
-    <!-- Set the minimum Win10 SDK version to TH1/RTM. -->
+  <PropertyGroup>
+    <!-- Set the minimum Windows 10 SDK version to TH1/RTM. -->
     <WindowsTargetPlatformMinVersion>10.0.10240.0</WindowsTargetPlatformMinVersion>
   </PropertyGroup>
   <!-- The following import will set the PlatformToolset configuration. -->
diff --git a/icu4c/source/common/common.vcxproj b/icu4c/source/common/common.vcxproj
index 10fec32..c9e4f98 100644
--- a/icu4c/source/common/common.vcxproj
+++ b/icu4c/source/common/common.vcxproj
@@ -16,22 +16,6 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup>
     <_ProjectFileVersion>10.0.30319.1</_ProjectFileVersion>
diff --git a/icu4c/source/common/common_uwp.vcxproj b/icu4c/source/common/common_uwp.vcxproj
index eb947a8..65672e1 100644
--- a/icu4c/source/common/common_uwp.vcxproj
+++ b/icu4c/source/common/common_uwp.vcxproj
@@ -52,10 +52,6 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
-  <ImportGroup Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup>
     <_ProjectFileVersion>10.0.30319.1</_ProjectFileVersion>
diff --git a/icu4c/source/common/rbbidata.h b/icu4c/source/common/rbbidata.h
index 0c078a8..3749f16 100644
--- a/icu4c/source/common/rbbidata.h
+++ b/icu4c/source/common/rbbidata.h
@@ -197,8 +197,8 @@
     UnicodeString       fRuleString;
     UBool               fDontFreeData;
 
-    RBBIDataWrapper(const RBBIDataWrapper &other); /*  forbid copying of this class */
-    RBBIDataWrapper &operator=(const RBBIDataWrapper &other); /*  forbid copying of this class */
+    RBBIDataWrapper(const RBBIDataWrapper &other) = delete; /*  forbid copying of this class */
+    RBBIDataWrapper &operator=(const RBBIDataWrapper &other) = delete; /*  forbid copying of this class */
 };
 
 
diff --git a/icu4c/source/common/rbbitblb.cpp b/icu4c/source/common/rbbitblb.cpp
index 2f12d60..bcbdab9 100644
--- a/icu4c/source/common/rbbitblb.cpp
+++ b/icu4c/source/common/rbbitblb.cpp
@@ -1608,7 +1608,7 @@
             row->r8.fTagsIdx    = 0;
             for (col=0; col<catCount; col++) {
                 U_ASSERT(rowString->charAt(col) <= kMaxStateFor8BitsTable);
-                row->r8.fNextState[col] = rowString->charAt(col);
+                row->r8.fNextState[col] = static_cast<uint8_t>(rowString->charAt(col));
             }
         } else {
             row->r16.fAccepting = 0;
diff --git a/icu4c/source/data/makedata.vcxproj b/icu4c/source/data/makedata.vcxproj
index f92c2f9..4309f43 100644
--- a/icu4c/source/data/makedata.vcxproj
+++ b/icu4c/source/data/makedata.vcxproj
@@ -12,10 +12,6 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
-  <ImportGroup Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup>
     <_ProjectFileVersion>10.0.30319.1</_ProjectFileVersion>
diff --git a/icu4c/source/data/makedata_uwp.vcxproj b/icu4c/source/data/makedata_uwp.vcxproj
index f89bac0..7b4ae4d 100644
--- a/icu4c/source/data/makedata_uwp.vcxproj
+++ b/icu4c/source/data/makedata_uwp.vcxproj
@@ -47,10 +47,6 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
-  <ImportGroup Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup>
     <_ProjectFileVersion>10.0.30319.1</_ProjectFileVersion>
diff --git a/icu4c/source/extra/uconv/uconv.vcxproj b/icu4c/source/extra/uconv/uconv.vcxproj
index 1929ac4..e00a288 100644
--- a/icu4c/source/extra/uconv/uconv.vcxproj
+++ b/icu4c/source/extra/uconv/uconv.vcxproj
@@ -14,22 +14,6 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup>
     <_ProjectFileVersion>10.0.30319.1</_ProjectFileVersion>
diff --git a/icu4c/source/i18n/i18n.vcxproj b/icu4c/source/i18n/i18n.vcxproj
index c447162..96c8726 100644
--- a/icu4c/source/i18n/i18n.vcxproj
+++ b/icu4c/source/i18n/i18n.vcxproj
@@ -16,22 +16,6 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup>
     <_ProjectFileVersion>10.0.30319.1</_ProjectFileVersion>
diff --git a/icu4c/source/i18n/i18n_uwp.vcxproj b/icu4c/source/i18n/i18n_uwp.vcxproj
index 1751b5f..c33be61 100644
--- a/icu4c/source/i18n/i18n_uwp.vcxproj
+++ b/icu4c/source/i18n/i18n_uwp.vcxproj
@@ -52,10 +52,6 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
-  <ImportGroup Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup>
     <_ProjectFileVersion>10.0.30319.1</_ProjectFileVersion>
diff --git a/icu4c/source/io/io.vcxproj b/icu4c/source/io/io.vcxproj
index 3849abc..c324236 100644
--- a/icu4c/source/io/io.vcxproj
+++ b/icu4c/source/io/io.vcxproj
@@ -16,22 +16,6 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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diff --git a/icu4c/source/stubdata/stubdata.vcxproj b/icu4c/source/stubdata/stubdata.vcxproj
index 68ebe0d..7c58b7e 100644
--- a/icu4c/source/stubdata/stubdata.vcxproj
+++ b/icu4c/source/stubdata/stubdata.vcxproj
@@ -16,22 +16,6 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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diff --git a/icu4c/source/test/cintltst/cintltst.vcxproj b/icu4c/source/test/cintltst/cintltst.vcxproj
index 2f54863..251d4fd 100644
--- a/icu4c/source/test/cintltst/cintltst.vcxproj
+++ b/icu4c/source/test/cintltst/cintltst.vcxproj
@@ -14,22 +14,6 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
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diff --git a/icu4c/source/test/cintltst/cstrtest.c b/icu4c/source/test/cintltst/cstrtest.c
index cfc3a3d..985b8ff 100644
--- a/icu4c/source/test/cintltst/cstrtest.c
+++ b/icu4c/source/test/cintltst/cstrtest.c
@@ -387,7 +387,7 @@
 TestInvCharToAscii() {
     for (int32_t i = 0;; ++i) {
         char ic = nativeInvChars[i];
-        uint8_t ac = asciiInvChars[i];
+        uint8_t ac = (uint8_t)asciiInvChars[i];
         uint8_t actual = uprv_invCharToAscii(ic);
         if (actual != ac) {
             log_err("uprv_invCharToAscii('%c') did not convert to ASCII 0x%02x\n", ic, (int)ac);
diff --git a/icu4c/source/test/cintltst/unumberformattertst.c b/icu4c/source/test/cintltst/unumberformattertst.c
index 8919c78..324a144 100644
--- a/icu4c/source/test/cintltst/unumberformattertst.c
+++ b/icu4c/source/test/cintltst/unumberformattertst.c
@@ -321,7 +321,7 @@
             sprintf(buffer, "measure-unit/%s per-measure-unit/%s",
                     simpleMeasureUnits[i], simpleMeasureUnits[j]);
             int32_t outputlen = 0;
-            u_strFromUTF8(ubuffer, BUFFER_LEN, &outputlen, buffer, strlen(buffer), &status);
+            u_strFromUTF8(ubuffer, BUFFER_LEN, &outputlen, buffer, (int32_t)strlen(buffer), &status);
             if (U_FAILURE(status)) {
                 log_err("FAIL u_strFromUTF8: %s = %s ( %s )\n", locale, buffer,
                         u_errorName(status));
diff --git a/icu4c/source/test/intltest/intltest.vcxproj b/icu4c/source/test/intltest/intltest.vcxproj
index dbdb3e0..6e956d9 100644
--- a/icu4c/source/test/intltest/intltest.vcxproj
+++ b/icu4c/source/test/intltest/intltest.vcxproj
@@ -15,22 +15,6 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup>
     <_ProjectFileVersion>10.0.30319.1</_ProjectFileVersion>
diff --git a/icu4c/source/test/intltest/strtest.cpp b/icu4c/source/test/intltest/strtest.cpp
index 54b5a19..043355f 100644
--- a/icu4c/source/test/intltest/strtest.cpp
+++ b/icu4c/source/test/intltest/strtest.cpp
@@ -483,11 +483,11 @@
         std::string stdhaystack(cas.haystack);
         std::string stdneedle(cas.needle);
         assertEquals(Int64ToUnicodeString(caseNumber) + u" (std)",
-            cas.expected, stdhaystack.find(stdneedle, 0));
+            cas.expected, static_cast<int32_t>(stdhaystack.find(stdneedle, 0)));
         // Test offsets against std::string::find
         for (int32_t offset = 0; offset < haystack.length(); offset++) {
             assertEquals(Int64ToUnicodeString(caseNumber) + "u @ " + Int64ToUnicodeString(offset),
-                stdhaystack.find(stdneedle, offset), haystack.find(needle, offset));
+                static_cast<int32_t>(stdhaystack.find(stdneedle, offset)), haystack.find(needle, offset));
         }
         caseNumber++;
     }
diff --git a/icu4c/source/test/iotest/iotest.vcxproj b/icu4c/source/test/iotest/iotest.vcxproj
index 4de4540..7ed7342 100644
--- a/icu4c/source/test/iotest/iotest.vcxproj
+++ b/icu4c/source/test/iotest/iotest.vcxproj
@@ -14,22 +14,6 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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-  </ImportGroup>
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup>
     <_ProjectFileVersion>10.0.30319.1</_ProjectFileVersion>
diff --git a/icu4c/source/test/letest/gendata.vcxproj b/icu4c/source/test/letest/gendata.vcxproj
index 5a0b943..f29232b 100644
--- a/icu4c/source/test/letest/gendata.vcxproj
+++ b/icu4c/source/test/letest/gendata.vcxproj
@@ -49,22 +49,6 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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-  </ImportGroup>
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   <PropertyGroup>
     <_ProjectFileVersion>10.0.30319.1</_ProjectFileVersion>
diff --git a/icu4c/source/test/letest/letest.vcxproj b/icu4c/source/test/letest/letest.vcxproj
index e2a5499..5936d5e 100644
--- a/icu4c/source/test/letest/letest.vcxproj
+++ b/icu4c/source/test/letest/letest.vcxproj
@@ -49,22 +49,6 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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diff --git a/icu4c/source/test/perf/charperf/charperf.vcxproj b/icu4c/source/test/perf/charperf/charperf.vcxproj
index 1128037..a2b4382 100644
--- a/icu4c/source/test/perf/charperf/charperf.vcxproj
+++ b/icu4c/source/test/perf/charperf/charperf.vcxproj
@@ -47,22 +47,6 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
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-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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diff --git a/icu4c/source/test/perf/collperf/collperf.vcxproj b/icu4c/source/test/perf/collperf/collperf.vcxproj
index 807894d..4eaae91 100644
--- a/icu4c/source/test/perf/collperf/collperf.vcxproj
+++ b/icu4c/source/test/perf/collperf/collperf.vcxproj
@@ -47,22 +47,6 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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diff --git a/icu4c/source/test/perf/collperf2/collperf2.vcxproj b/icu4c/source/test/perf/collperf2/collperf2.vcxproj
index cb6cb11..42422e2 100644
--- a/icu4c/source/test/perf/collperf2/collperf2.vcxproj
+++ b/icu4c/source/test/perf/collperf2/collperf2.vcxproj
@@ -47,22 +47,6 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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diff --git a/icu4c/source/test/perf/convperf/convperf.vcxproj b/icu4c/source/test/perf/convperf/convperf.vcxproj
index 41bdd92..3a87532 100644
--- a/icu4c/source/test/perf/convperf/convperf.vcxproj
+++ b/icu4c/source/test/perf/convperf/convperf.vcxproj
@@ -47,22 +47,6 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
-  </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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diff --git a/icu4c/source/test/perf/normperf/dtfmtrtperf.vcxproj b/icu4c/source/test/perf/normperf/dtfmtrtperf.vcxproj
index 689ce06..b3146ea 100644
--- a/icu4c/source/test/perf/normperf/dtfmtrtperf.vcxproj
+++ b/icu4c/source/test/perf/normperf/dtfmtrtperf.vcxproj
@@ -50,22 +50,6 @@
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.props" />
   <ImportGroup Label="ExtensionSettings">
   </ImportGroup>
-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
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-  <ImportGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="PropertySheets">
-    <Import Project="$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props" Condition="exists('$(UserRootDir)\Microsoft.Cpp.$(Platform).user.props')" Label="LocalAppDataPlatform" />
-    <Import Project="$(VCTargetsPath)Microsoft.CPP.UpgradeFromVC71.props" />
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diff --git a/icu4c/source/tools/toolutil/toolutil.vcxproj b/icu4c/source/tools/toolutil/toolutil.vcxproj
index 2149bd8..5fe0035 100644
--- a/icu4c/source/tools/toolutil/toolutil.vcxproj
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