dynamics crm 2011 - how to read Data context parameter from a crm to silverlight webresource -

i have silverlight webresource in crm 2011. task append data parameter in url like

https://www.............../data=1234 

now in silverlight application need read data parameter. have tried read data

  if (app.current.host.initparams["data"] != string.empty)             {                 string callernumber = app.current.host.initparams["data"];  ...  

and

i tried filtering code

string url = system.windows.browser.htmlpage.document.documenturi.tostring();             var uri = new uri(url);             var callernumber = uri.query; 

callernumber have ?data=1234

but still not able data parameter. help

i believe find in query string. can access this

foreach (var item in htmlpage.document.querystring) {     //do data }