Final tidy up for improved C# SwigDerviedClassHasMethod implementation

Author: wsfulton

CHANGES.current

@@ -7,6 +7,10 @@ the issue number to the end of the URL: https://github.com/swig/swig/issues/
 Version 4.1.0 (in progress)
 ===========================
 
+2022-05-26: rokups
+            [C#] #1323 Modify SwigDerivedClassHasMethod for a more efficient director
+            implementation when calling virtual methods that are not overidden.
+
 2022-05-15: erezgeva, eiselekd
             [Lua, Perl, Octave, PHP, Tcl] #2275 #2276 #2283 Add argcargv.i library containing
             (int ARGC, char **ARGV) multi-argument typemaps.

Examples/test-suite/csharp/director_basic_runme.cs

@@ -50,7 +50,7 @@ void run()
       myNewBar.x = 10;
 
       // Low level implementation check
-//      my.testSwigDerivedClassHasMethod();
+      my.testSwigDerivedClassHasMethod();
 
       // These should not call the C# implementations as they are not overridden
       int v;

Examples/test-suite/director_basic.i

@@ -71,11 +71,12 @@
  %}
 
  %typemap(cscode) MyClass %{
+   // low level implementation check for checking MyOverriddenClass
    public void testSwigDerivedClassHasMethod() {
      if (SwigDerivedClassHasMethod("nonVirtual", swigMethodTypes3))
-       throw new global::System.Exception("non-overriding non-virtual method would be when connecting director");
+       throw new global::System.Exception("SwigDerivedClassHasMethod failed checking a non-overriding non-virtual method (nonVirtual)");
      if (SwigDerivedClassHasMethod("nonOverride", swigMethodTypes4))
-       throw new global::System.Exception("non-overriding virtual method would be when connecting director");
+       throw new global::System.Exception("SwigDerivedClassHasMethod failed checking a non-overriding method (nonOverride)");
    }
  %}