Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/errors/cs0192.cs

@@ -0,0 +1,23 @@
+// CS0192: A readonly field `A.a' cannot be passed ref or out (except in a constructor)
+// Line: 17
+
+using System;
+
+class A
+{
+	public readonly int a=5;
+	
+	public void Inc (ref int a)
+	{
+		++a;
+	}
+	
+	public void IncCall ()
+	{
+		Inc (ref a);
+	}
+	
+	static void Main ()
+	{
+	}
+}