using System;
using System.Reflection;
class Program {
   static void Main() {
      object obj = AppDomain.CurrentDomain.CreateInstanceAndUnwrap(
                                  "Foo.dll", "NMFoo.Calc");
      Type type = obj.GetType();
      object[] parameters = new object[2];
      parameters[0] = 7;
      parameters[1] = 8;
      int result = (int) type.InvokeMember(
                              "Sum",       // Name of the method.
                              BindingFlags.InvokeMethod,
                              null,        // Don't need a binder.
                              obj,         // The target object.
                              parameters); // Parameters.
      // Here, the value of 'result' is 15.
   }
}