Addressing review comments

src/SourceBuild/content/eng/tools/tasks/Microsoft.DotNet.SourceBuild.Tasks.LeakDetection/CheckForPoison.cs

@@ -233,7 +233,8 @@ namespace Microsoft.DotNet.SourceBuild.Tasks.LeakDetection
             {
                 return NonShippingPackagesListFiles
                     .SelectMany(item => File.ReadAllLines(item.ItemSpec))
-                    .Distinct();
+                    .Distinct()
+                    .ToList();
             }
             else
             {

src/SourceBuild/patches/runtime/0001-Allow-source-build-to-set-UsingToolMicrosoftNetCompi.patch

@@ -4,6 +4,7 @@ Date: Wed, 25 Jan 2023 20:21:17 +0000
 Subject: [PATCH] Allow source-build to set UsingToolMicrosoftNetCompilers
  property
 
+backport: https://github.com/dotnet/runtime/pull/81180
 ---
  eng/Versions.props | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)