Gets or sets a value that indicates whether the Popup control closes when the control is no longer in focus.
Namespace:System.Windows.Controls.Primitives Assembly:PresentationFramework (in PresentationFramework.dll) XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
Type: System.Boolean true if the Popup control closes when IsOpen property is set to false; false if the Popup control closes when a mouse or keyboard event occurs outside the Popup control. The default is true.
When the StaysOpen property is set to true, Popup stays open until it is explicitly closed by setting the IsOpen property to false. When StaysOpen is false, the Popup control intercepts all mouse and keyboard events to determine when one of these events occurs outside the Popup control.