I managed to export it to SilverLight with
var wmf = new ReaderWmf();
wmf.Read(fileName);
var settings=new SilverlightXamlWriterSettings
{
SilverlightVersion =
SilverlightXamlWriterSettings.SilverlightVersionType.Silverlight_2
};
string xaml = wmf.GetXaml(settings);
But it produces Drawing Brushes which are not available in Silverlight
For a workaround i found following:
http://www.codeproject.com/KB/silverlight/Silverlight-DrawingBrush.aspx
Sincerly Thomas Stocker