I want to insert record using stored procedure,I am using entity framework

Here is my sample code.

please anyone help me 

 [HttpPost]
       
public ActionResult Add(RegistrationForm Model)
       
{
     using(var context = new DemoEntities())
            {
                if (Model.Id == 0)
                {
                   
context.RegistrationForms.Add(Model);
                }
                else
                {
                    context.Entry(Model).State= EntityState.Modified;
                }
 
                // context.RegistrationForms.Add(Model);
                ViewData["Message"] = "Success";
 
            }
            Return View();
       
}