DockPanel, which only makes an appearance in WPF, enables easy docking of elements to an entire side of the panel, stretching it to fill the entire width or height. (This is unlike Canvas, which enables you to dock elements to a corner only.) DockPanel also enables a single element to fill all the remaining space unused by the docked elements.

DockPanel has a Dock attached property so children can control their docking with one of four possible values: Left (the default when Dock isn’t applied), Top, Right, and Bottom. Note that there is no Fill value for Dock. Instead, the last child added to a DockPanel fills the remaining space unless DockPanel’s LastChildFill property is set to false. With LastChildFill set to true (the default), ...

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