Delete An Uploaded Image In ASP.NET

I think You will be saving image in the local folder.And file name or type in database.,In that case it's a normal delete.
if you want to delete file from folder

try this
  Name space--Using system.IO

 File.delete(server.Mappath(filename));


http://msdn.microsoft.com/en-us/library/system.io.filesystemwatcher.aspx

refer the below link..,

where do you store the image in local folder or database...,?