‘System.Windows, Version=2.0.5.0,
Culture=neutral, PublicKeyToken=7cec85d7bea7798e’
Si risolve
aggiungendo il riferimento alla System.windows.dll che si trova nella cartella
SilverLight
(We found it we had to
go into the Silverlight folder and found the System.Windows.dll and now all is
good thanks for the help though!)