Dumb/easy question

That image looks to me like a snapshot of a console application.

If so, this code should reproduce it:

using System;

class Test
{
    static void Main()
    {
        int[,] ia = new int[3,3]{{2,9,4},{7,5,3},{6,1,8}};
        Console.Clear();
        string horizontal = "+--+--+--+";
        string vertical = "| ";
        Console.WriteLine(horizontal);
        for(int i = 0; i < 3; i++)
        {
          for(int j = 0; j < 3; j++)
          {
            Console.Write(vertical);
            Console.Write(ia[i,j]);            
          }
          Console.WriteLine(vertical);
          Console.WriteLine(horizontal);
        }
        Console.ReadKey();
    }
}