Http Header code (example 200,404,..)

[C# Programming]

I want to determine HTTP header code of a URL by C# code. How could I get that?

I use the following code :

public Dictionary GetHTTPResponseHeaders(string Url)
{
Dictionary HeaderList = new Dictionary();

WebRequest WebRequestObject = HttpWebRequest.Create(Url);
WebResponse ResponseObject = WebRequestObject.GetResponse();

foreach (string HeaderKey in ResponseObject.Headers)
{
HeaderList.Add(HeaderKey, ResponseObject.Headers[HeaderKey]);
textBox1.Text += HeaderKey + ": " + ResponseObject.Headers[HeaderKey]+" " ;
}
ResponseObject.Close();

return HeaderList;
}


but It does not contain of HTTP header Code!