[Mono-list] Embedded Mono: calling c# method from c does not work...

[Ipo]

Hello, i'm beginner with c and mono. Now i have a "little" problem. I can not
get resurt from my assembly.  Here is my Code:
c#
#################################################################
using System;
namespace MySpace 
{
	class MyClass 
	{
		int val = 5;
		string str = "hello";

		MyClass () 
		{
			Console.WriteLine ("while Constructor Val", val);
			Console.WriteLine ("While In ctor str is: {0}", str);
		}
		
		MyClass (int v, byte[] array) 
		{
			Console.WriteLine ("Constructor: In ctor (int, byte[]) got value: {0},
array len: {1}", v, array.Length);
		}

		public string Testi (ref int v, ref string s) 
		{
			Console.WriteLine ("In Values () param v is {0}", v);
			Console.WriteLine ("In Values () params s is: {0}", s);
			string paluu = "Hello";
			return paluu;
		}
		static void Main()
		{
		}
	}
}
#################################################################
c:
	val = 100;
	str2 = mono_string_new (domain, "param2");
	args [0] = &val;
	args [1] = &str2;
	MonoObject *result = mono_runtime_invoke (my_method, obj, args, NULL);
	MonoString *strReturn = (MonoString *)mono_object_unbox(result);
	 
	str = mono_string_to_utf8(strReturn);	
	printf ("result from method is: %s\n", str);

#################################################################
Compiling goes ok. but when i run c-code:
** ERROR **: file object.c: line 4097 (mono_object_unbox): assertion failed:
(obj->vtable->klass->valuetype)
#################################################################
I got integer values Ok.

I dont only now how to typecast object with mono_object_unbox to string. 
Actually i am more interested to call from c-language  C# method who returns
IList.


yours.

Ipo










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