Get URL parameters from a string in .NET
Solution 1:
Use static ParseQueryString method of System.Web.HttpUtility class that returns NameValueCollection.
Uri myUri = new Uri("http://www.example.com?param1=good¶m2=bad");
string param1 = HttpUtility.ParseQueryString(myUri.Query).Get("param1");
Check documentation at http://msdn.microsoft.com/en-us/library/ms150046.aspx
Solution 2:
This is probably what you want
var uri = new Uri("http://domain.test/Default.aspx?var1=true&var2=test&var3=3");
var query = HttpUtility.ParseQueryString(uri.Query);
var var2 = query.Get("var2");