#314 Mandelbrot Set in ASCII format using C#

Program.cs

class Mandelbrot_set
{
    static void Main(string[] args)
    {
        double realCoord, imagCoord;
        double realTemp, imagTemp, realTemp2, arg;
        int iterations;
        for (imagCoord = 1.2; imagCoord >= -1.2; imagCoord -= 0.05)
        {
            for (realCoord = -0.6; realCoord <= 1.77; realCoord += 0.03)
            {
                iterations = 0;
                realTemp = realCoord;
                imagTemp = imagCoord;
                arg = (realCoord * realCoord) + (imagCoord * imagCoord);
                while ((arg < 4) && (iterations < 40))
                {
                    realTemp2 = (realTemp * realTemp) - (imagTemp * imagTemp)
                    - realCoord;
                    imagTemp = (2 * realTemp * imagTemp) - imagCoord;
                    realTemp = realTemp2;
                    arg = (realTemp * realTemp) + (imagTemp * imagTemp);
                    iterations += 1;
                }
                switch (iterations % 4)
                {
                    case 0:
                        Console.Write("0");
                        break;
                    case 1:
                        Console.Write("1");
                        break;
                    case 2:
                        Console.Write("2");
                        break;
                    case 3:
                        Console.Write("3");
                        break;
                }
            }
            Console.Write("\n");
        }
        Console.ReadKey();
    }
}