Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/errors/cs0579-8.cs

@@ -0,0 +1,21 @@
+// CS0579: The attribute `System.ObsoleteAttribute' cannot be applied multiple times
+// Line : 17
+
+using System;
+
+[AttributeUsage (AttributeTargets.ReturnValue)]
+public class ReturnAttribute : Attribute
+{
+        public ReturnAttribute ()
+        {
+	}
+}
+
+class MainClass {
+        [Obsolete]
+        [return: Return]
+        [Obsolete]
+        static void Main()
+        {
+        }
+}