var assembly = Assembly.LoadFile(fullpathofexecutable);
BindingFlags eFlags = BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic;

Type classInstance = GetClass("Class196", assembly.GetTypes());

MethodInfo myMethod = classInstance.GetMethod("methodThatIWantToExecute", eFlags);

object[] arguments = {1,2,3 };
string result = (string)myMethod.Invoke(null, arguments);

BindingFlags eFlags = BindingFlags.Instance |BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic;

  foreach (TypeDef type in module.GetTypes())
  {
        Type classInstance = type.GetType();

        foreach (MethodDef method in type.Methods)
         {

           if (method.RVA.ToString() == RVA.ToString())
            {
                 importedMethod = classInstance.GetMethod(method.Name, eFlags);