Imported Upstream version 5.8.0.22

Former-commit-id: df344e34b07851d296efb3e6604c8db42b6f7aa3

mcs/errors/cs1644-53.cs

@@ -0,0 +1,11 @@
+// CS1644: Feature `tuples' cannot be used because it is not part of the C# 6.0 language specification
+// Line: 7
+// Compiler options: -langversion:6
+
+class Class
+{
+	static (int, bool) Foo ()
+	{
+		return;
+	}	
+}