using System;  

    using System.Collections.Generic;  

    using System.Linq;  

    using System.Text;  

    using System.IO;  

    using System.Diagnostics;  

    using System.Runtime.InteropServices;  

    namespace Consolefullscreen  

    {  

       class Program  

       {  

          [DllImport("kernel32.dll", ExactSpelling = true)]  

          private static extern IntPtr GetConsoleWindow();  

          private static IntPtr ThisConsole = GetConsoleWindow();  

          [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]  

          private static extern bool ShowWindow(IntPtr hWnd, int nCmdShow);  

          private const int HIDE = 0;  

          private const int MAXIMIZE = 3;  

          private const int MINIMIZE = 6;  

          private const int RESTORE = 9;  

          static void Main(string[] args)  

          {  

             Console.SetWindowSize(Console.LargestWindowWidth, Console.LargestWindowHeight);  

             ShowWindow(ThisConsole, MAXIMIZE);  

             Console.ReadLine();  

          }  

       }  

    }