Form. showdialog and form. Show

Assume that the following method is executed in a form1 form:
Private void testshowdialog ()
{
Form2 F2 = new form2 ();
F2.showdialog ();
// After the F2 form is displayed, the operation will be performed on the F2 form. form1 is temporarily restricted. If the pop-up F2 is closed, the following dialog box will pop up.
MessageBox. Show ("F2 is disabled! ");
}
If the following method is used
Private void testshow ()
{
Form2 F2 = new form2 ();
F2.show ();
// After the F2 form pops up, it will pop up below. The form1 and the new F2 pop-up can exist at the same time, and you can operate on any form as needed, if F2 is disabled, it will not affect form1,
MessageBox. Show ("F2 is not closed yet! ");
}
After showdialog is used, you can use f2.dispose (); to destroy the F2 form.