WebRequest not getting full HTML code of webpage

I'm trying to get the HTML code of the Google webpage in C# after something is searched (i.e. "http://ift.tt/2ixSo9Q"). I'm using WebRequest to get the HTML code from the webpage. But when I pull up the code, the webpage is missing details.

Here's my code (which probably has a lot of unnecessary stuff):

 WebRequest request = WebRequest.Create("http://ift.tt/1Np4SUI" + textBox1.Text.Replace(" ", "%20"));
    request.Credentials = CredentialCache.DefaultCredentials;
    ((HttpWebRequest)request).UserAgent = "Chrome 41.0.2228.0";
    ((HttpWebRequest)request).AllowAutoRedirect = true;
    ((HttpWebRequest)request).AuthenticationLevel = System.Net.Security.AuthenticationLevel.None;
    ((HttpWebRequest)request).KeepAlive = true;
    WebResponse response = request.GetResponse();
    Stream dataStream = response.GetResponseStream();
    StreamReader reader = new StreamReader(dataStream);
    string dwnld = reader.ReadToEnd();
    reader.Close(); 

When I search "asdf", the output from the code has 10,000 characters. When I search "asdf" on Google and launch inspect element, it has 416,000 characters.

How do I get the whole webpage? Thanks in advance!