MediaElement.IsMuted Property
Silverlight
Gets or sets a value indicating whether the audio is muted.
Namespace: System.Windows.Controls
Assembly: System.Windows (in System.Windows.dll)
Dependency property identifier field: IsMutedProperty
Muting the media is most relevant for scenarios involving a VideoBrush.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.