using System;

class App 
{
	static void Main() 
	{
	typeof(Internal).GetNestedType("Private", System.Reflection.BindingFlags.NonPublic).GetMethod("PrintMessage",
	System.Reflection.BindingFlags.NonPublic | 
		System.Reflection.BindingFlags.Static).Invoke(null, new object[]{"Привет","Вася!"});
		// TBD
	}
}

sealed class Internal 
{
	sealed class Private 
	{
		static void PrintMessage( string s1, string s2 ) 
		{
			System.Console.WriteLine(s1 + "-" + s2);
		}
	}
}