1 files changed, 32 insertions, 0 deletions
diff --git a/src/mscorlib/src/System/ThreadAttributes.cs b/src/mscorlib/src/System/ThreadAttributes.cs
new file mode 100644
index 0000000000..bbd859c3af
--- /dev/null
+++ b/src/mscorlib/src/System/ThreadAttributes.cs
@@ -0,0 +1,32 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+/*=============================================================================
+**
+**
+**
+** Purpose: For Threads-related custom attributes.
+**
+**
+=============================================================================*/
+
+namespace System {
+    [AttributeUsage (AttributeTargets.Method)]  
+[System.Runtime.InteropServices.ComVisible(true)]
+    public sealed class STAThreadAttribute : Attribute
+    {
+        public STAThreadAttribute()
+        {
+        }
+    }
+
+    [AttributeUsage (AttributeTargets.Method)]  
+[System.Runtime.InteropServices.ComVisible(true)]
+    public sealed class MTAThreadAttribute : Attribute
+    {
+        public MTAThreadAttribute()
+        {
+        }
+    }
+}