why？Why I use C# to write the form, pop up, I in the command line space after the form disappeared, and then how can not pop out of the form, what is going on. When I first popped up the form, I manually entered the command, the form is OK, but after the command line space, the form disappeared, and then how can not pop out the form, May I ask why this is, to close the rhino after re-opening it