C #: Etudes, part 2

Continuation, the beginning here.

I will begin with a social survey: what methods do you know to execute the code before the start of the Main () function (I hope that they will list all that I know and a couple of unknowns :))?

And now the puzzle:

Here is a small code that displays two characters (by the way, check yourself: in what order will they be displayed?). An underscore "_" must be displayed between these characters.
Of course, the task would be trivial without restrictions. And they are as follows:

• do not define another Main method
• do not use the Console identifier as the name of the class, property, field, etc. (thanks to irc-user Gopneg)
• do not change the code of all existing methods: App.Main, XX, YY
• do not change the definition of the Xy field
• do not add new fields to class X

using System;

class Y
{
  public Y()
  {
    Console.Write("0");
  }
}

class X
{
  public X()
  {
    Console.Write("o");
  }
  Y y = new Y();
}

class App
{
  static void Main()
  {
    X x = new X();
  }
}

* This source code was highlighted with Source Code Highlighter.

Good luck!

PS
so, we have two winners: mace was the first and guessed the author’s decision: http://habrahabr.ru/blogs/net/77039/#comment_2241079
and the bobermaniac habrayuzer suggested a way to elegantly bypass my restriction on redefining Console: http: // habrahabr .ru / blogs / net / 77039 / # comment_2241109

By the way, the question of calling the code before Main is still relevant! So far, the most obvious has been proposed - the static constructor of the class.

PPS
Suddenly, another solution was proposed by SHSE : http://habrahabr.ru/blogs/net/77039/#comment_2243183 , and it is based on completely different mechanisms, but it works great! )