/// <summary>
/// Overlay the text and/or image watermark over the image specified in the <paramref name="filePath" /> parameter and return.
/// </summary>
/// <param name="filePath">A string representing the full path to the image file
/// (e.g. "C:\mypics\myprettypony.jpg", "myprettypony.jpg").</param>
/// <param name="galleryId">The gallery ID. The watermark associated with this gallery is applied to the file.</param>
/// <returns>
/// Returns a System.Drawing.Image instance containing the image with the watermark applied.
/// </returns>
public static System.Drawing.Image AddWatermark(string filePath, int galleryId)
{
Watermark wm = Factory.GetWatermarkInstance(galleryId);
return(wm.ApplyWatermark(filePath));
}