An error occured

System.Net.WebException: An exception occurred during a WebClient request. ---> System.IO.IOException: There is not enough space on the disk. at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath) at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost) at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access) at System.Net.WebClient.DownloadFile(Uri address, String fileName) --- End of inner exception stack trace --- at System.Net.WebClient.DownloadFile(Uri address, String fileName) at _Default.Page_Load(Object sender, EventArgs e) in d:\Services\Pics_85\Default.aspx.cs:line 80