Make any image gray style

public static Bitmap MakeGrayscale(Bitmap original)

{

  //make an empty bitmap the same size as original

  Bitmap newBitmap = new Bitmap(original.Width, original.Height);

  for (int i = 0; i < original.Width; i++)

  {

      for (int j = 0; j < original.Height; j++)

      {

          //get the pixel from the original image

          Color originalColor = original.GetPixel(i, j);

          //create the grayscale version of the pixel

          int grayScale = (int)((originalColor.R * .3) + (originalColor.G * .59)

              + (originalColor.B * .11));

          //create the color object

          Color newColor = Color.FromArgb(grayScale, grayScale, grayScale);

          //set the new image's pixel to the grayscale version

          newBitmap.SetPixel(i, j, newColor);

      }

  }

  return newBitmap;

}