Linq Save and Update Query

#region ButtonSave
        protected void btnsave_Click(object sender, EventArgs e)
        {

          

            if (Code != String.Empty && !string.IsNullOrEmpty(Code))
            {
                if (UpdateAccounts())
                {
                    mvMarketFactors.ActiveViewIndex = 0;
                    msgWarning.Visible = true;
                    lblmessage.Text = "Successfully Updated";
                    BindGrid();
                }
            }
            else
            {

                if (SaveAccounts())
                {
                    mvMarketFactors.ActiveViewIndex = 0;
                    msgWarning.Visible = true;
                    lblmessage.Text = "Successfully Inserted";
                    BindGrid();

                }
            }


        }
        #endregion

        #region SaveAccounts
        private bool SaveAccounts()
        {
            bool flag = true;
            var osoID = Convert.ToInt32(ddlOso.SelectedValue);
            var ManagersID = Convert.ToInt32(ddlManagers.SelectedValue);

            TcaManager TcaManagersID = db.TcaManagers.Where(x => x.TcaManagerID == ManagersID).FirstOrDefault();
            MstrOSoOfficesMarket OsoID = db.MstrOSoOfficesMarkets.Where(x => x.OSOOfficesMarketsPkID == osoID).FirstOrDefault();

            MarketFactor tbl = new MarketFactor();

            tbl.Title = txtTitle.Text.Trim();
            tbl.Summary = txtSummary.Text.Trim();
            tbl.Details = txtDetails.Text.Trim();
            if (RBIsPositiveYes.Checked == true)
            {
                tbl.IsPositive = 1;
            }
            else
            {
                tbl.IsPositive = 0;
            }
            if (RByes.Checked == true)
            {
                tbl.IsActive = 1;
            }
            else
            {
                tbl.IsActive = 0;
            }

            tbl.MstrOSoOfficesMarket = OsoID;
            tbl.TcaManager = TcaManagersID;

            tbl.CreatedBy = Session["LoginUser"].ToString();
            tbl.IsDeleted = 0;
            tbl.CreatedDate = DateTime.UtcNow;

            db.AddToMarketFactors(tbl);
            db.SaveChanges();

            var attachmentMarketFactorsID = 0;
            attachmentMarketFactorsID = tbl.MarketFactorsPkID;
            var filepkID = 0;
            AddAttachments(filepkID, attachmentMarketFactorsID);
            return flag;
        }
        #endregion

#region UpdateAccounts
        private bool UpdateAccounts()
        {

            bool flag = true;

            var MarketFactorsPkID = Convert.ToInt32(Code);
            var osoID = Convert.ToInt32(ddlOso.SelectedValue);
            var ManagersID = Convert.ToInt32(ddlManagers.SelectedValue);

            MarketFactor tbl = db.MarketFactors.First(i => i.MarketFactorsPkID == MarketFactorsPkID);

            tbl.Title = txtTitle.Text.Trim();
            tbl.Summary = txtSummary.Text.Trim();
            tbl.Details = txtDetails.Text.Trim();
            if (RByes.Checked == true)
            {
                tbl.IsActive = 1;
            }
            else
            {
                tbl.IsActive = 0;
            }

            TcaManager TcaManagersID = db.TcaManagers.Where(x => x.TcaManagerID == ManagersID).FirstOrDefault();
            MstrOSoOfficesMarket OsoID = db.MstrOSoOfficesMarkets.Where(x => x.OSOOfficesMarketsPkID == osoID).FirstOrDefault();
            tbl.MstrOSoOfficesMarket = OsoID;
            tbl.TcaManager = TcaManagersID;

            tbl.ModifiedBy = Session["LoginUser"].ToString();
            tbl.ModifiedDate = DateTime.UtcNow;
            //Save the changes back to database.
            db.SaveChanges();
            return flag;
        }
        #endregion