private void btngosterpopup_Click(object sender, EventArgs e)
{
MusteriKayit m1 = new MusteriKayit();
m1.ShowDialog(); // method of showdialog helps us to show users what we want to show them however users can not do
//any other task rather then what is inside of showdialog. First must be done this task, than you can go to another task.
}
private void btngoster_Click(object sender, EventArgs e)
{
MusteriKayit m1 = new MusteriKayit();
m1.Show();
// method of Show() helps us to bring what we want to show to the users , users can go back to the main or can make
//different tasks while methhod of shows working
}