How to resize WPF DataGrid to fit its content?

Question

The aim

I would like to set such size for the DataGrid (standard, from WPF) so all cells (text) would be fully visible. I have window with DockPanel, with DataGrid

Answer 1

Marko's comment is the answer:

I'm at a bit of a loss with your resizing logic. First of all, if you set the window's SizeToContent="WidthAndHeight", then the window is shown to the full size of the datagrid. On the other hand, if you show a window at some predefined size, and you want to resize the window once the window is shown, then at that point resizing to the datagrid's desired with is very counter intuitive. Because the resizing will jump from say 100px to 400px, but what if I want to resize to only 250px... (asuming you resize by dragging the corner of the window)