Support '1.' TFM for CsWinRT 3.0

Author: Sergio0694

eng/ManualVersions.props

@@ -9,6 +9,17 @@
   Basically: In this file, choose the highest version when resolving merge conflicts.
  -->
   <PropertyGroup>
+
+    <!-- CsWinRT 3.0 targeting packs -->
+    <MicrosoftWindowsSDKNETRef10_0_17763_1PackageVersion>10.0.17763.57</MicrosoftWindowsSDKNETRef10_0_17763_1PackageVersion>
+    <MicrosoftWindowsSDKNETRef10_0_18362_1PackageVersion>10.0.18362.57</MicrosoftWindowsSDKNETRef10_0_18362_1PackageVersion>
+    <MicrosoftWindowsSDKNETRef10_0_19041_1PackageVersion>10.0.19041.57</MicrosoftWindowsSDKNETRef10_0_19041_1PackageVersion>
+    <MicrosoftWindowsSDKNETRef10_0_20348_1PackageVersion>10.0.20348.57</MicrosoftWindowsSDKNETRef10_0_20348_1PackageVersion>
+    <MicrosoftWindowsSDKNETRef10_0_22000_1PackageVersion>10.0.22000.57</MicrosoftWindowsSDKNETRef10_0_22000_1PackageVersion>
+    <MicrosoftWindowsSDKNETRef10_0_22621_1PackageVersion>10.0.22621.57</MicrosoftWindowsSDKNETRef10_0_22621_1PackageVersion>
+    <MicrosoftWindowsSDKNETRef10_0_26100_1PackageVersion>10.0.26100.57</MicrosoftWindowsSDKNETRef10_0_26100_1PackageVersion>
+
+    <!-- CsWinRT 2.x targeting packs-->
     <MicrosoftWindowsSDKNETRef10_0_17763PackageVersion>10.0.17763.57</MicrosoftWindowsSDKNETRef10_0_17763PackageVersion>
     <MicrosoftWindowsSDKNETRef10_0_18362PackageVersion>10.0.18362.57</MicrosoftWindowsSDKNETRef10_0_18362PackageVersion>
     <MicrosoftWindowsSDKNETRef10_0_19041PackageVersion>10.0.19041.57</MicrosoftWindowsSDKNETRef10_0_19041PackageVersion>

src/Layout/redist/targets/GenerateBundledVersions.targets

@@ -1318,8 +1318,21 @@ Copyright (c) .NET Foundation. All rights reserved.
                               TargetingPackName="NETStandard.Library.Ref"
                               TargetingPackVersion="$(NETStandardLibraryRefPackageVersion)"
                               />
-
-    <!-- Supported Windows versions -->
+    
+    <!--
+      Supported Windows versions using CsWinRT 3.0 (.NET 10 is the baseline). This leverages the patch version of
+      the Windows SDK version to allow multi-targeting, which is required to allow customers to gradually migrate.
+      Both CsWinRT 3.0 and 2.x will be supported for a period of time, and packages can target both of them.
+    -->
+    <WindowsSdkSupportedTargetPlatformVersion Include="10.0.26100.1" WindowsSdkPackageVersion="$(MicrosoftWindowsSDKNETRef10_0_26100_1PackageVersion)" MinimumNETVersion="10.0" />
+    <WindowsSdkSupportedTargetPlatformVersion Include="10.0.22621.1" WindowsSdkPackageVersion="$(MicrosoftWindowsSDKNETRef10_0_22621_1PackageVersion)" MinimumNETVersion="10.0" />
+    <WindowsSdkSupportedTargetPlatformVersion Include="10.0.22000.1" WindowsSdkPackageVersion="$(MicrosoftWindowsSDKNETRef10_0_22000_1PackageVersion)" MinimumNETVersion="10.0" />
+    <WindowsSdkSupportedTargetPlatformVersion Include="10.0.20348.1" WindowsSdkPackageVersion="$(MicrosoftWindowsSDKNETRef10_0_20348_1PackageVersion)" MinimumNETVersion="10.0" />
+    <WindowsSdkSupportedTargetPlatformVersion Include="10.0.19041.1" WindowsSdkPackageVersion="$(MicrosoftWindowsSDKNETRef10_0_19041_1PackageVersion)" MinimumNETVersion="10.0" />
+    <WindowsSdkSupportedTargetPlatformVersion Include="10.0.18362.1" WindowsSdkPackageVersion="$(MicrosoftWindowsSDKNETRef10_0_18362_1PackageVersion)" MinimumNETVersion="10.0" />
+    <WindowsSdkSupportedTargetPlatformVersion Include="10.0.17763.1" WindowsSdkPackageVersion="$(MicrosoftWindowsSDKNETRef10_0_17763_1PackageVersion)" MinimumNETVersion="10.0" />
+
+    <!-- Supported Windows versions using CsWinRT 2.x -->
     <WindowsSdkSupportedTargetPlatformVersion Include="10.0.26100.0" WindowsSdkPackageVersion="$(MicrosoftWindowsSDKNETRef10_0_26100PackageVersion)" MinimumNETVersion="8.0" />
     <WindowsSdkSupportedTargetPlatformVersion Include="10.0.22621.0" WindowsSdkPackageVersion="$(MicrosoftWindowsSDKNETRef10_0_22621PackageVersion)" MinimumNETVersion="8.0" />
     <WindowsSdkSupportedTargetPlatformVersion Include="10.0.22000.0" WindowsSdkPackageVersion="$(MicrosoftWindowsSDKNETRef10_0_22000PackageVersion)" MinimumNETVersion="8.0" />