Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/errors/cs0105.cs

@@ -0,0 +1,15 @@
+// CS0105: The using directive for `System' appeared previously in this namespace
+// Line: 6
+// Compiler options: -warnaserror -warn:3
+
+using System;
+using System;
+
+public class X
+{
+	static int Main () 
+	{
+		int a=5;
+		return a;
+	}
+}