On windows there can be problems with Tools that do not support Unico…

…de, and Username containing Unicode chars.

#9229

src/Shared/TempFileUtilities.cs

@@ -36,7 +36,7 @@ internal static void ClearTempFileDirectory()
         // For all native calls, directly check their return values to prevent bad actors from getting in between checking if a directory exists and returning it.
         private static string CreateFolderUnderTemp()
         {
-            string basePath = Path.Combine(Path.GetTempPath(), $"MSBuildTemp{Environment.UserName}");
+            string basePath = Path.Combine(Path.GetTempPath(), "MSBuildTemp");
 
             if (NativeMethodsShared.IsLinux && NativeMethodsShared.mkdir(basePath, userRWX) != 0)
             {