Main form not shown in Taskbar

Question

What could be the reasons for the Main application form not to be shown in TaskBar?

ShowInTaskbar property is set to "true", but form doesn't show itself there if after running the application and before the Main form appears I switch to some other window. Form exists, but until I minimize apps that are above to make it visible, it won't show in Taskbar.

UPDATE. Form does not have an Owner.

Answer 1

I've added form.Activate() after form.Show(). Now it always jumps out when completely loaded, and doesn't get lost under some other screens.

Though it is not a solution, but a crutch, responses are welcome anyway.