using System;

class SomeForeignClass
{
	public void Ololo()
	{
		Test.GlobalVar = "Ololo";
	}
}

public class Test
{
	public static string GlobalVar = "Global";
	
	public static void Main()
	{
		var o = new SomeForeignClass();
		Console.WriteLine(GlobalVar);
		o.Ololo();
		Console.WriteLine(GlobalVar);
	}
}