Gets or sets the thickness of the specified font.
Assembly: System.Windows (in System.Windows.dll)
This property can only select from fonts that already exist in a font family. It does not programmatically create alternative weights, except when a family contains a regular weight and no bold weight. In this case, Silverlight will simulate a bold weight by increasing the width of strokes using a 2D graphic algorithm.
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.