How to pass value through post method from one website to another website

 
            try
            {
                PostData MyPostdata = new PostData();
                MyPostdata.Url = "https://www.xyzCompany.com/verification.aspx";
                MyPostdata.Add("UserID", UserID);
                MyPostdata.Add("DistributorCode", DCODE);
                MyPostdata.Add("SessionID", YourSessionID);
                MyPostdata.Post();
            }
            catch { }