Window.AllowsTransparency Property
Gets or sets a value that indicates whether a window's client area supports transparency.
Namespace: System.Windows
Assembly: PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
| Exception | Condition |
|---|---|
| InvalidOperationException | AllowsTransparency is changed after a window has been shown. |
| InvalidOperationException | A window that has a WindowStyle value of anything other than None. |
When the Background property of a window is set to a transparent color, using Transparent for example, the window remains opaque. This means that the desktop and any running applications "beneath" the window cannot be seen. To enable this type of transparency, AllowsTransparency must be set to true.
AllowsTransparency exists to facilitate the creation of non-rectangular windows, and, consequently, when AllowsTransparency is set to true, a window's WindowStyle property must be set to None.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
