Hi there, If you want to set the expiration date for an image, you can do that in the IIS snap-in. Right click on the image to open the Properties dialog box, on the HTTP Headers tab, you select the Enable Content Expiration checkbox. Now you can set the expiration date for the file. You can also apply this way for setting the web site contents such as directories or files. In addition, you can use the Cache-Control header to achieve that thing. For more information, you can see these documents: http://support.microsoft.com/kb/247404/EN-US/[^] http://www.aspnetresources.com/blog/cache_control_extensions.aspx[^]
