Server Error in '/' Application.

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[PathTooLongException: The specified path, file name, or both are too long. The fully qualified file name must be less than 260 characters, and the directory name must be less than 248 characters.]
   System.IO.Path.NormalizePath(String path, Boolean fullCheck, Int32 maxPathLength, Boolean expandShortPaths) +11795239
   System.IO.Path.NormalizePath(String path, Boolean fullCheck, Int32 maxPathLength) +21
   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) +369
   System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost) +66
   System.IO.StreamWriter.CreateFile(String path, Boolean append, Boolean checkHost) +73
   System.IO.StreamWriter..ctor(String path, Boolean append, Encoding encoding, Int32 bufferSize, Boolean checkHost) +73
   System.IO.File.InternalWriteAllText(String path, String contents, Encoding encoding, Boolean checkHost) +64
   System.IO.File.WriteAllText(String path, String contents, Encoding encoding) +42
   Template.BLL.TrimWriter.Create(String virtualPath, String contents) +218
   Template.BLL.PageLoading.Page_Load(Object sender, EventArgs e) +1683
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +51
   System.Web.UI.Control.OnLoad(EventArgs e) +95
   System.Web.UI.Control.LoadRecursive() +59
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +678