Make WriteCodeFragment task locale-independent for reproducible builds

src/Tasks.UnitTests/WriteCodeFragment_Tests.cs

@@ -1201,5 +1201,57 @@ private static void CheckContent(string actualContent, string[] expectedAttribut
 
             expectedContent.ShouldBe(normalizedActualContent);
         }
+
+        /// <summary>
+        /// Test that the generated comment is culture-invariant for reproducible builds
+        /// </summary>
+        [Theory]
+        [InlineData("en-US")]
+        [InlineData("fr-FR")]
+        [InlineData("ja-JP")]
+        [InlineData("de-DE")]
+        public void CommentIsInvariantCulture(string cultureName)
+        {
+            var originalCulture = System.Globalization.CultureInfo.CurrentUICulture;
+            try
+            {
+                System.Globalization.CultureInfo.CurrentUICulture = new System.Globalization.CultureInfo(cultureName);
+
+                WriteCodeFragment task = new WriteCodeFragment();
+                MockEngine engine = new MockEngine(true);
+                task.BuildEngine = engine;
+                TaskItem attribute = new TaskItem("System.AssemblyVersionAttribute");
+                attribute.SetMetadata("_Parameter1", "1.0.0.0");
+                task.AssemblyAttributes = [attribute];
+                task.Language = "c#";
+                task.OutputDirectory = new TaskItem(Path.GetTempPath());
+                bool result = task.Execute();
+
+                result.ShouldBeTrue();
+                string content = File.ReadAllText(task.OutputFile.ItemSpec);
+
+                // Helper function to extract the WriteCodeFragment comment from generated code
+                static string ExtractMSBuildComment(string content) =>
+                    content.Split(MSBuildConstants.CrLf)
+                           .FirstOrDefault(line => line.Trim().StartsWith("//") && line.Contains("MSBuild"));
+
+                string comment = ExtractMSBuildComment(content);
+
+                // Comment should be the expected invariant English text regardless of culture
+                comment.ShouldNotBeNullOrWhiteSpace();
+                comment.Trim().ShouldBe("// Generated by the MSBuild WriteCodeFragment class.");
+
+                // Cleanup
+                if (task.OutputFile != null && File.Exists(task.OutputFile.ItemSpec))
+                {
+                    File.Delete(task.OutputFile.ItemSpec);
+                }
+            }
+            finally
+            {
+                // Restore original culture
+                System.Globalization.CultureInfo.CurrentUICulture = originalCulture;
+            }
+        }
     }
 }

src/Tasks/AssemblyResources.cs

@@ -29,6 +29,22 @@ internal static string GetString(string name)
             return resource;
         }
 
+        /// <summary>
+        /// Loads the specified resource string using invariant culture, either from the assembly's primary resources, or its shared resources.
+        /// This method is useful for generating code that should be culture-independent for reproducible builds.
+        /// </summary>
+        /// <remarks>This method is thread-safe.</remarks>
+        /// <returns>The resource string, or null if not found.</returns>
+        internal static string GetInvariantString(string name)
+        {
+            // NOTE: the ResourceManager.GetString() method is thread-safe
+            string resource = PrimaryResources.GetString(name, CultureInfo.InvariantCulture) ?? SharedResources.GetString(name, CultureInfo.InvariantCulture);
+
+            ErrorUtilities.VerifyThrow(resource != null, "Missing resource '{0}'", name);
+
+            return resource;
+        }
+
         /// <summary>
         /// Gets the assembly's primary resources i.e. the resources exclusively owned by this assembly.
         /// </summary>

src/Tasks/WriteCodeFragment.cs

@@ -168,7 +168,7 @@ private string GenerateCode(out string extension)
                 unit.Namespaces.Add(globalNamespace);
 
                 // Declare authorship. Unfortunately CodeDOM puts this comment after the attributes.
-                string comment = ResourceUtilities.GetResourceString("WriteCodeFragment.Comment");
+                string comment = AssemblyResources.GetInvariantString("WriteCodeFragment.Comment");
                 globalNamespace.Comments.Add(new CodeCommentStatement(comment));
 
                 if (AssemblyAttributes == null)