WSHCommon/Common/CommonFroms/ImageUtils.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace CommonFroms
{
    public static class ImageUtils
    {
        public static System.Drawing.Bitmap ImageToBitmap(System.Drawing.Image dimg)
        {
            System.Drawing.Bitmap image;

            if (!(dimg is System.Drawing.Bitmap) || dimg.Palette != null)
            {
                image = new System.Drawing.Bitmap(dimg.Width, dimg.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
                System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(image);
                try
                {
                    g.DrawImage(
                        dimg,
                        new System.Drawing.Rectangle(0, 0, dimg.Width, dimg.Height),
                        new System.Drawing.Rectangle(0, 0, dimg.Width, dimg.Height),
                        System.Drawing.GraphicsUnit.Pixel);
                }
                finally { g.Dispose(); }
            }
            else
            {
                image = (System.Drawing.Bitmap)dimg;
            }

            return image;
        }
    }
}