How to get URL without querystring

VB.NET

Dim stringUri As String = 'http://www.syncfusion.com/?id=1&auid=16'
Dim weburi As Uri = New Uri(stringUri)
Dim query As String = weburi.Query
Dim weburl As String = stringUri.Substring(0, stringUri.Length - query.Length)
Response.Write(weburl)

C#

 
string stringUri = 'http://www.syncfusion.com/?id=1&auid=16'; 
Uri weburi = new Uri(stringUri); 
string query = weburi.Query; 
string weburl = stringUri.Substring(0, stringUri.Length - query.Length);
Response.Write (weburl);