Imported Upstream version 3.10.0

Former-commit-id: 172c8e3c300b39d5785c7a3e8dfb08ebdbc1a99b

mcs/tests/test-null-operator-03.cs

@@ -0,0 +1,33 @@
+using System;
+
+class C
+{
+    int field;
+
+    int Test1 ()
+    {
+        var x = this?.field;
+        if (x == null)
+            return 1;
+
+        var x2 = "abc"?.GetHashCode();
+        if (x2 == null)
+            return 2;
+
+        return 0;
+    }
+
+    static int Main ()
+    {
+        var c = new C ();
+        c.Test1 ();
+
+        const C c2 = null;
+        var res = c2?.field;
+        if (res != null)
+            return 1;
+
+    	Console.WriteLine ("ok");
+        return 0;
+    }
+}