How to determine if Window was launching as a modal using ShowDialog

Question

I have a WPF Window created. I have some cases where i want to display it using ShowDialog() and others just using Show().

For the ShowDialog() i want to set the DialogResult which all works fine, however if the window is launched using Show() and i set the DialogResult i get the exception

DialogResult can be set only after Window is created and shown as dialog. 

How to i determine how the window was launched so i can place a condition on setting the DialogResult?

Answer 1

Check the Owner property on the child dialog. If Show() was used the child window Owner won't be set automatically but it should be when you use ShowDialog().