how to create folder and save file in mvc

 public void createfolder(string subFolderName, string officeCode, string DestinationPath)
        {
            if (!Directory.Exists(DestinationPath.Trim()))
            {
                DirectoryInfo di = Directory.CreateDirectory(DestinationPath.Trim());
            }
            if (!Directory.Exists(Path.Combine(DestinationPath.Trim(), officeCode)))
            {
                DirectoryInfo di = Directory.CreateDirectory(Path.Combine(DestinationPath.Trim(), officeCode));
            }
            if (!Directory.Exists(Path.Combine(DestinationPath.Trim(), officeCode, subFolderName)))
            {
                DirectoryInfo di = Directory.CreateDirectory(Path.Combine(DestinationPath.Trim(), officeCode, subFolderName));
            }
        }

[HttpPost]
        public ActionResult Save(BOOfficeMaster bOOfficeMaster)
        {
            if (ModelState.IsValid)
            {
                bLOfficeMaster.Save(bOOfficeMaster);
                var m = bLOfficeMaster.GetOfficeMaster().OrderByDescending(n => n.PSASOfficeCode).First();
                PSAS.Models.CustomerMaster.BusinessLayer.BLCustomerMaster oBLCustomerMaster = new Models.CustomerMaster.BusinessLayer.BLCustomerMaster();
                string officeCode = m.PSASOfficeCode.ToString();
                PSAS.Models.CustomerMaster.BusinessObject.BODocumentPathConfig oBODocumentPathConfig = null;
                oBODocumentPathConfig = oBLCustomerMaster.getDocumentPathConfig(91);

                createfolder("PASARALICENCE", officeCode, oBODocumentPathConfig.DestinationPath);
DestinationPath="C:\PSASMVC\AppDocument\PSASOFFICEDOCUMENT\";
                createfolder("SHOPANDESTABLISHMENTLICENCE", officeCode, oBODocumentPathConfig.DestinationPath);
                createfolder("RENTAGREEMENT", officeCode, oBODocumentPathConfig.DestinationPath);
                createfolder("TRAININGCERTIFICATE", officeCode, oBODocumentPathConfig.DestinationPath);
                if (bOOfficeMaster.PasaraLicencefu.ContentLength > 0)
                    bOOfficeMaster.PasaraLicencefu.SaveAs(Path.Combine(oBODocumentPathConfig.DestinationPath.Trim(), officeCode, "PASARALICENCE", bOOfficeMaster.PasaraLicencefu.FileName));
                if (bOOfficeMaster.ShopEstablishmentLicencefu.ContentLength > 0)
                    bOOfficeMaster.ShopEstablishmentLicencefu.SaveAs(Path.Combine(oBODocumentPathConfig.DestinationPath.Trim(), officeCode, "SHOPANDESTABLISHMENTLICENCE", bOOfficeMaster.ShopEstablishmentLicencefu.FileName));
                if (bOOfficeMaster.RentAgreementfu.ContentLength > 0)
                    bOOfficeMaster.RentAgreementfu.SaveAs(Path.Combine(oBODocumentPathConfig.DestinationPath.Trim(), officeCode, "RENTAGREEMENT", bOOfficeMaster.RentAgreementfu.FileName));
                if (bOOfficeMaster.TrainingCertificatefu.ContentLength > 0)
                    bOOfficeMaster.TrainingCertificatefu.SaveAs(Path.Combine(oBODocumentPathConfig.DestinationPath.Trim(), officeCode, "TRAININGCERTIFICATE", bOOfficeMaster.TrainingCertificatefu.FileName));
                TempData["success"] = "Data Saved Successfully.";
            }
            return RedirectToAction("Index");
        }