Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/errors/cs0656-3.cs

@@ -0,0 +1,21 @@
+// CS0656: The compiler required member `System.Threading.Interlocked.CompareExchange(ref T, T, T)' could not be found or is inaccessible
+// Line: 20
+// Compiler options: -nostdlib CS0656-corlib.cs
+
+namespace System {
+    public partial class Delegate {
+	public static Delegate Combine(Delegate a, Delegate b) { return null; }
+	public static void Remove(Delegate a, Delegate b) { return; }
+    }
+}
+
+namespace System.Threading {
+    class Interlocked {}
+}
+
+delegate void D();
+
+class Test
+{
+    event D ev;
+}