Namespace:System.Windows.Controls Assembly:PresentationFramework (in PresentationFramework.dll) XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
String representation of a Double value equal to or greater than 0.0034 but equal to or less than 160000. An unqualified value is measured in device independent pixels. Strings need not explicitly include decimal points.
A double value as described above, (excepting Auto) followed by one of the following unit specifiers: px, in, cm, pt.
px (default) is device-independent units (1/96th inch per unit)