/// <summary>
/// Send a POST request to a web page. Returns the contents of the page.
/// </summary>
/// <param name="url">The address to POST to.</param>
/// <param name="postVars">The list of variables to POST to the server.</param>
public string Post(string url, PostPackageBuilder postVars, ProxySettings settings)
{
return(Post(url, postVars.PostDataString, settings));
}