Window Size when SizeToContent is not specified

Question

When the following XAML used, the window size is not 5000x5000, but some small window where the button is cropped.

Answer 1

I guess the OS has provided the window with these values. It might be related to how Windows OS remembers the size of any window before it was last closed.*

The same way I suppose windows provided a default height and width to your window when none of the dimensions where specified.

• You could try it with notepad. Open it. Resize it. Close it. Now again open it. Hmm..