1 files changed, 17 insertions, 0 deletions

diff --git a/src/wix/WixToolset.Converters/HashSetExtensions.cs b/src/wix/WixToolset.Converters/HashSetExtensions.cs
new file mode 100644
index 00000000..49b0d4ac
--- /dev/null
+++ b/src/wix/WixToolset.Converters/HashSetExtensions.cs
@@ -0,0 +1,17 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
+
+namespace WixToolset.Converters
+{
+    using System.Collections.Generic;
+
+    internal static class HashSetExtensions
+    {
+        public static void AddRange<T>(this HashSet<T> set, IEnumerable<T> values)
+        {
+            foreach (var value in values)
+            {
+                set.Add(value);
+            }
+        }
+    }
+}