Introduction - If you have any usage issues, please Google them yourself
C# function with a history menu
Often use the menu in the history of the function (that is, open a file, there will be historical information to facilitate the next direct use), click the File menu under the open file submenu, open the need to access file. The next time you run the software, the last opened file name has been recorded to the File menu in the history menu, the menu, you can open the appropriate file.