Hi guys

I have someone who downloaded my program using click-once.
My program allows user to read a .txt file and then manipulate data

The user selects the file to open by goin gto File>Open on menu strip

I have a user who gets an error message upon clicking on File Open

It doesnt open up the OpenFileDialog
return ans unhandled exception

Method not found
System Windows.Forms OpenFileDialog get_SafeFileName

Anyone have an idea what i should be looking at I cant re-create it on my end

Thanks