I use : image.Save("c:\\drawline2.gif",System.Drawing.Imaging.ImageFormat.Gif); Image1.ImageUrl="c:\\drawline2.gif"; image.Dispose(); g.Dispose();to finish .gif save,but by another computer connection,I can't display this .gif document,I know it is because image.Save() happen some problem,I don't know how to write code to resolve it!Thank you!