Use .NET 10

Author: tmat

eng/Build.proj

@@ -50,27 +50,11 @@
 
     <Exec Command="dotnet --info" WorkingDirectory="$(ArtifactsDir)" />
 
-    <!-- Due to bug https://github.com/dotnet/sdk/issues/47008 we cannot pass paths that contain drive letters to "dotnet sln add".
-         We do some contortion here to make the paths relative, and run them from the root directory. This code is a big ugly because
-         there's no Path.GetRelativePath on .NET Framework. -->
-    <PropertyGroup>
-      <DriveRootPath>$([System.IO.Path]::GetPathRoot('$(ArtifactsDir)'))</DriveRootPath>
-      <ArtifactsDirRelative>$([System.String]::Copy('$(ArtifactsDir)').Substring(3))</ArtifactsDirRelative>
-    </PropertyGroup>
-
     <!-- Create the solution. Use 'force' to override existing. -->
-    <Exec Command="dotnet new sln -n $(MSBuildProjectName) -o $(ArtifactsDir) --force" WorkingDirectory="$(DriveRootPath)" />
-
-    <!-- Strip the drive letter and backslash, e.g. D:\ => -->
-    <ItemGroup>
-      <BuildProjectWithRel Include="@(BuildProject)">
-        <!-- Trim the first three characters: D:\ -->
-        <RelPath>$([System.String]::Copy('%(BuildProject.FullPath)').Substring(3))</RelPath>
-      </BuildProjectWithRel>
-    </ItemGroup>
+    <Exec Command="dotnet new sln -n $(MSBuildProjectName) -o $(ArtifactsDir) -f sln --force" WorkingDirectory="$(DriveRootPath)" />
 
     <!-- Add each BuildProject to the solution. -->
-    <Exec Command="dotnet sln &quot;$(ArtifactsDirRelative)/$(MSBuildProjectName).sln&quot; add &quot;%(BuildProjectWithRel.RelPath)&quot;" WorkingDirectory="$(DriveRootPath)" />
+    <Exec Command="dotnet sln &quot;$(ArtifactsDir)$(MSBuildProjectName).sln&quot; add &quot;%(BuildProject.FullPath)&quot;" />
 
     <!-- Build the solution. -->
     <MSBuild Projects="$(ArtifactsDir)$(MSBuildProjectName).sln" Targets="@(BuildTarget)" BuildInParallel="true" Condition="'@(BuildTarget)' != ''" />

eng/pipelines/templates/build-pull-request.yml

@@ -31,12 +31,19 @@ jobs:
 
   # Ensure the .NET runtime needed by our unit tests is installed.
   - task: UseDotNet@2
-    displayName: Install .NET Runtime
+    displayName: Install .NET 9.0.x Runtime
     inputs:
       packageType: runtime
       # This should match the target of our unit test projects.
       version: 9.0.x
 
+  # .NET SDK used for build
+  - task: UseDotNet@2
+    displayName: Install .NET 10.x Runtime
+    inputs:
+      includePreviewVersions: true
+      version: 10.x
+
   # Allows for accessing the internal AzDO feed (vs-impl-internal) for project restore via Azure Artifacts Credential Provider.
   # See: https://github.com/microsoft/artifacts-credprovider#automatic-usage
   # YAML reference: https://docs.microsoft.com/azure/devops/pipelines/tasks/package/nuget-authenticate?view=azure-devops

eng/pipelines/templates/generate-localization.yml

@@ -23,9 +23,8 @@ jobs:
   - task: UseDotNet@2
     displayName: Install .NET Runtime
     inputs:
-      packageType: runtime
-      # This should match the target in OneLocBuildSetup.csproj.
-      version: 9.0.x
+      includePreviewVersions: true
+      version: 10.x
 
   # Creates the LocProject.json and perform some necessary file copying and renaming.
   - task: DotNetCoreCLI@2

global.json

@@ -0,0 +1,6 @@
+{
+  "sdk": {
+    // necessary for VS to find pre-release SDKs
+    "allowPrerelease": true
+  }
+}