How to: Add Controls to a WPF Window
The WPF Designer for Visual Studio provides a design surface that supports the familiar drag-and-drop functionality by way of the Toolbox. This topic describes how to add controls to an existing WPF window in the WPF Designer.
In the WPF Designer, drag a control from the Toolbox to the design surface.
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In the Toolbox, double-click the desired control.