New Post: User.GetUserFromId

{
    public TwitterService()
    {
        TwitterCredentials.SetCredentials(
           ConfigurationManager.AppSettings["TwitterAccessToken"],
           ConfigurationManager.AppSettings["TwitterAccessTokenSecret"],
           ConfigurationManager.AppSettings["TwitterAPIKey"],
           ConfigurationManager.AppSettings["TwitterAPISecret"]);
    }

    public string GetImageUrl(string providerUserID)
    {
        try
        {
            var user = User.GetUserFromId(long.Parse(providerUserID));

            if (user != null)
            {
                return user.ProfileImageUrl;
            }
        }
        catch (Exception ex)
        {
        }

        return null;
    }