Where is system.web.silverlight.dll in Silverlight 4 ?

Published on Wednesday, September 15, 2010

There is a Silverlight project which created in Silverlight 2, but when it opened in Visual Studio 2010 which converts the Silverlight 2 project to Silverlight 4, the system.web.silverlight reference can not be located because there is no more system.web.silverlight in Silverlight 3 / 4, which meas you can not find system.web.silverlight.dll file.

The reason is because there is no more system.web.silverlight in Silverlight 3 / 4 which is mentioned above, Silverlight 3 and silverlight 4 no more use <asp:Silverlight> tag for silverlight control but use <object> tag, for example:

    data="data:application/x-silverlight-2," 
    type="application/x-silverlight-2" &gt;
    &lt;param name="source" value="SilverlightApplication1.xap"/&gt;
&lt;/object&gt;

more info on creating object tag please check MSDN (http://msdn.microsoft.com/en-us/library/cc189089(VS.95).aspx)