get name of download file in C#

From: K (adnin_at_ukr.net)
Date: 12/30/04 

Date: Fri, 31 Dec 2004 00:51:36 +0200

i download file with this function
public static string LoadContentFromWeb(string uri)
        {

            string content = string.Empty;
            WebRequest request = WebRequest.Create(uri);

            request.Proxy = WebProxy.GetDefaultProxy();
            request.Proxy.Credentials = CredentialCache.DefaultCredentials;
            request.Credentials = CredentialCache.DefaultCredentials;

            WebResponse response = request.GetResponse();

            Stream stream = response.GetResponseStream();
            StreamReader reader = new StreamReader(stream,
Encoding.Default);
            content = reader.ReadToEnd();
            response.Close();

            return content;
        }

how can i take a name of downloading file?