How to dock a Tab Control in WPF

Unlike Windows Forms controls, the WPF controls do not have Dock properties. To dock to fill a Tab Control on a Grid, you just need to remove Width, Height, and Alignment properties of a control.

Here is a window where a Tab control is filled on a Grid panel.

Here is the code snippet. You drag and drop a TabControl on the window and remove its Width, Height and alignment properties.

Here are some more related articles.

DockPanel in WPF

WPF Controls,Layout panel and Graphics primitives

Canvas in WPF

Grid in WPF

WrapPanel in WPF

Cheers!