When my form design interface when editing files close and reopen frmMain.Designer.cs not see the look of the form, press Rebuil ..., press F5 or click Clear Solution no errors, press F5 to run normally, view form, but not the interface design in the form editor mode, in drafting VS screen and press select view designer frmMain.cs it his fault output stream to the attached word file, this case you can go back to the most recent edits or a way to view the form interface design? (Except sit redesigned from scratch) you view attachments error: http://www.mediafire.com/file/3fnke7btqaiab47/Error.doc