Occurs when a finger touches the screen while the finger is over this element.
(in PresentationCore.dll)XMLNS for XAML:
member TouchDown : IEvent<EventHandler<TouchEventArgs>,
<object TouchDown="EventHandler<TouchEventArgs>" .../>
By default, the PreviewTouchDown and TouchDown events do not occur until a finger touches the screen and moves. Pressing a finger on the screen and holding it without moving it causes the press and hold behavior of a Stylus. The press and hold behavior is equivalent to a mouse right-click.
To cause the PreviewTouchDown and TouchDown events to occur as soon as a finger touches the screen, set the Stylus.IsPressAndHoldEnabled attached property to false for this element.
Supported in: 4.5.2, 4.5.1, 4.5, 4
.NET Framework Client Profile
Supported in: 4
Windows 8.1, Windows Server 2012 R2, 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.