Handle dynamic data in umbraco

•     public class OrganizationController : UmbracoApiController
      {
          // GET: Surface
          //public ActionResult Index()
          //{
          //    return View();
          //}List<OrganizationalModel>
          [HttpGet]
          public BaseModel Get(OrganizationalModel model)
          {
              List<OrganizationalModel> orgList = new List<OrganizationalModel>();
              var rootNode = Umbraco.TypedContentAtRoot().FirstOrDefault();
              var organizationList = rootNode.Children.Where(i => i.DocumentTypeAlias == "organization");
              foreach (var child in organizationList)
              {
                  var orgObj = new OrganizationalModel { organizationName = child.Name };
                  orgList.Add(orgObj);
  
              }
  
              return new BaseModel { Data = orgList };
          }
  
          [HttpPost]
          [ActionName("CreateOrganisation")]
          public JsonResult CreateOrganisation(OrganizationalModel model)
          {
  
              var homeNode = Umbraco.TypedContentAtRoot().FirstOrDefault();
              //this is use for create dynamic content
              var ContentService = Services.ContentService;
  
              if (homeNode != null)
              {
                  //first to create organization using Content Service
                  var organization = ContentService.CreateContent(model.organizationName, homeNode.Id, "organization");
                  //now set all values
                  organization.SetValue("organizationName", model.organizationName);
                  //now save and publish parent Content
                  ContentService.SaveAndPublishWithStatus(organization);
  
                  var EmailList = ContentService.CreateContent("EmailList", organization.Id, "emailList");
                  ContentService.SaveAndPublishWithStatus(EmailList);
  
                  var welcome = ContentService.CreateContent("Welcome", EmailList.Id, "email");
                  welcome.SetValue("subject", "This is testing Subject");
                  welcome.SetValue("body", "This is testing body");
                  ContentService.SaveAndPublishWithStatus(welcome);
  
                  var Thanks = ContentService.CreateContent("Thanks", EmailList.Id, "email");
                  Thanks.SetValue("subject", "This is testing Subject");
                  Thanks.SetValue("body", "This is testing body");
                  ContentService.SaveAndPublishWithStatus(Thanks);
              }
              else
              {
                  return new JsonResult();
              }
  
              return new JsonResult();
          }
  
          [HttpGet]
          [ActionName("GetEmailTemplatesById")]
          public List<Email> GetEmailTemplatesById(string organizationId)
          {
              List<OrganizationalModel> orgList = new List<OrganizationalModel>();
              var rootNode = Umbraco.TypedContentAtRoot().FirstOrDefault();
             var organization= Umbraco.TypedContent(organizationId);
              //var organization = rootNode.Children.FirstOrDefault(i => i.DocumentTypeAlias == "organization" && i.Id == Convert.ToInt32(organizationId));
  
              var EmailList = organization.Children().FirstOrDefault();
              var EmailsTemplates = EmailList.Children();
  
              var returnEmails = new List<Email>();
              foreach (var template in EmailsTemplates)
              {
                  var email = new Email
                  {
                      Title = template.GetPropertyValue("subject").ToString(),
                      Description = template.GetProperty("body").Value.ToString()
                  };
                  returnEmails.Add(email);
              }
              return returnEmails;
          }
  
      }
  }