network drive io.file.copy

Hi i have a networked drive i need to copy files to from a c# web application, i am currently get a user authentication error, how can i authenticate a user and then copy the files?


//upload image to live server
            string sourcePath = @"E:\CompetitionImages";
            string targetPath = @"\\ipaddress\CompetitionImages";

            // Use Path class to manipulate file and directory paths.
            string sourceFile = System.IO.Path.Combine(sourcePath, smallImage);
            string destFile = System.IO.Path.Combine(targetPath, smallImage);

            // Create a ...