c# - ShowInTaskbar not working reliably in WPF -

I have a modal window in the WPF and the ShowInTaskbar is set to true for this window but The app icon is not appearing in the taskbar every time this model window. Occasionally the icon appears in the taskbar and sometimes it does not. But the application icon always appears in the taskbar when it launches the modal window (using the ShowDialog ). Window style is set to: 3DBorder window

The code to show the modal window is:

  winIHelper = new WindowInteropHelper ( _shell); _shell.SizeToContent = SizeToContent.WidthAndHeight; WinIHelper.Owner = parentHandle; _shell.ShowInTaskbar = true; _shell.Activate (); _shell.ShowDialog ();  

I had a case where ShowInTaskbar is not working

Solution to my case