Assembly assembly = Assembly.LoadFile(Application.StartupPath + "\\library.dll");
				
				foreach(Type t in assembly.GetTypes())
				{
					if (t.Name == "class_name")
					{
						object obj = Activator.CreateInstance(t);
						
						object[] argstopass = new object[] { (object)1};
						t.InvokeMember( "MethodName", BindingFlags.Default | BindingFlags.InvokeMethod, null, obj, argstopass);
						
						MessageBox.Show( "ok");
					}
				}