Add Powershell script to validate whether CSharp project correctly im…

…port shared props, update pipeline to enforce such validation, and fixed all projects that didn't import this shared props correctly

.pipelines/v2/templates/job-build-project.yml

@@ -314,6 +314,11 @@ jobs:
       flattenFolders: True
       OverWrite: True
 
+  # Check if all projects import common props.
+  - pwsh: |-
+      & '.pipelines/verifyCommonProps.ps1' -sourceDir '$(build.sourcesdirectory)'
+    displayName: Audit projects for shared common props
+
   # Check if deps.json files don't reference different dll versions.
   - pwsh: |-
       & '.pipelines/verifyDepsJsonLibraryVersions.ps1' -targetDir '$(build.sourcesdirectory)\$(BuildPlatform)\$(BuildConfiguration)'

.pipelines/verifyCommonProps.ps1

@@ -0,0 +1,60 @@
+[CmdletBinding()]
+Param(
+    [Parameter(Mandatory = $True, Position = 1)]
+    [string]$sourceDir
+)
+
+# scan all csharp project in the source directory
+function Get-CSharpProjects {
+    param (
+        [string]$path
+    )
+
+    # Get all .csproj files under the specified path
+    $csprojFiles = Get-ChildItem -Path $path -Recurse -Filter *.csproj
+
+    # Initialize an array to hold the file paths
+    $csprojArray = @()
+
+    foreach ($file in $csprojFiles) {
+        # Add the full path of each .csproj file to the array
+        $csprojArray += $file.FullName
+    }
+
+    # Return the array
+    return $csprojArray
+}
+
+# Check if the project file imports 'Common.Dotnet.CsWinRT.props'
+function Test-ImportSharedCsWinRTProps {
+    param (
+        [string]$filePath
+    )
+
+    # Load the XML content of the .csproj file
+    [xml]$csprojContent = Get-Content -Path $filePath
+
+
+    # Check if the Import element with Project attribute containing 'Common.Dotnet.CsWinRT.props' exists
+    return $csprojContent.Project.Import | Where-Object { $null -ne $_.Project -and $_.Project.EndsWith('Common.Dotnet.CsWinRT.props') }
+}
+
+# Call the function with the provided source directory
+$csprojFilesArray = Get-CSharpProjects -path $sourceDir
+
+$hasInvalidCsProj = $false
+
+# Enumerate the array of file paths and call Validate-ImportSharedCsWinRTProps for each file
+foreach ($csprojFile in $csprojFilesArray) {
+    $importExists = Test-ImportSharedCsWinRTProps -filePath $csprojFile
+    if (!$importExists) {
+        Write-Output "$csprojFile need to import 'Common.Dotnet.CsWinRT.props'."
+        $hasInvalidCsProj = $true
+    }
+}
+
+if ($hasInvalidCsProj) {
+    exit 1
+}
+
+exit 0

src/modules/AdvancedPaste/AdvancedPaste.FuzzTests/AdvancedPaste.FuzzTests.csproj

@@ -1,6 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
+	<!-- Look at Directory.Build.props in root for common stuff as well -->
+	<Import Project="..\..\Common.Dotnet.CsWinRT.props" />
+
 	<PropertyGroup>
-		<TargetFramework>net8.0-windows10.0.19041.0</TargetFramework>
 		<LangVersion>latest</LangVersion>
 		<ImplicitUsings>enable</ImplicitUsings>
 		<Nullable>enable</Nullable>

src/modules/Hosts/Hosts.FuzzTests/Hosts.FuzzTests.csproj

@@ -1,6 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
+	<!-- Look at Directory.Build.props in root for common stuff as well -->
+	<Import Project="..\..\Common.Dotnet.CsWinRT.props" />
+
 	<PropertyGroup>
-		<TargetFramework>net8.0-windows10.0.19041.0</TargetFramework>
 		<LangVersion>latest</LangVersion>
 		<ImplicitUsings>enable</ImplicitUsings>
 	</PropertyGroup>