public static void AddToBidderCompletedProjectSucessPayment(int projectid, int payerid, string payerole)
    {
        var context = new SidejobEntities();
        var biddercompletedprojectsucesspayment = new CompletedProjectSucessPayment
                                                      {
                                                          PayerID = payerid,
                                                          PayerProjectRole = "BIDDER",
                                                          PayerRole = payerole,
                                                          ProjectID = projectid
                                                      };
        context.AddToCompletedProjectSucessPayment(biddercompletedprojectsucesspayment);
        context.SaveChanges();

        //check to see if the poster has already made the payment:
        var posterpayment = (from c in context.CompletedProjectSucessPayment
                             where c.ProjectID == projectid && c.PayerProjectRole == "POSTER"
                             select c).FirstOrDefault();
        if (posterpayment != null)
        {
            //poster
            PosterSuccessPayment(projectid, 4, posterpayment.PayerRole, posterpayment.PayerID);
        }
    }