The Query property contains any query information included in the URI. Query information is separated from the path information by a question mark (?) and continues to the end of the URI. The query information returned includes the leading question mark.
The query information is escaped according to RFC 3986.
Uri baseUri = new Uri ("http://www.contoso.com/");
Uri myUri = new Uri (baseUri, "catalog/shownew.htm?date=today");
outputBlock.Text += "Uri.Query: ";
outputBlock.Text += myUri.Query;
outputBlock.Text += "\n";