[C#] Global Variable

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace project
{
    class Program
    {

            public static byte[,] feld = new byte[6, 7]; // Feld Variable - x=Reihe,y=spalte

        static void Main(string[] args)
        {

            Program.feld[0,0] = 0;
            funcs.draw_game();
            Console.ReadLine();
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace project
{
    class funcs
    {
        public static void draw_game()
        {
            Console.Write("\n\t\t      -----------------------"); // Obere Begrenzung
           for(byte a=0;a!=6;a++)
           {
               Console.Write("\n\t\t     | "); // Linker Rand
               for (byte i = 0; i != 7; i++)
               {
                if(Program.feld[a,i] == '0')
                   {
                   Console.Write(" 0 ");
                   }
               }
               Console.Write(" | "); // Rechter Rand
            }
           Console.Write("\n\t\t      -----------------------"); // Untere Begrenzung
        }
    }
}