public static void deleteRecord(int id)
 {
     try
     {
         using (JsonDatEntities context = new JsonDatEntities())
         {
             var obj = context.Students.FirstOrDefault(r => r.Id == id);
             context.Students.Remove(obj);
             context.SaveChanges();
         }
     }
     catch
     {
     }
 }
 public static int updateData(string name, string email, string age, int id)
 {
     try
     {
         int status = 0;
         using (JsonDatEntities context = new JsonDatEntities())
         {
             Student obj = context.Students.FirstOrDefault(r => r.Id == id);
             obj.Name  = name;
             obj.Email = email;
             obj.Age   = age;
             context.SaveChanges();
             status = obj.Id;
         }
         return(status);
     }
     catch
     {
         return(-1);
     }
 }
 public static int saveData(string name, string email, string age)
 {
     try
     {
         int status = 0;
         using (JsonDatEntities context = new JsonDatEntities())
         {
             Student obj = new Student();
             obj.Name  = name;
             obj.Email = email;
             obj.Age   = age;
             context.Students.Add(obj);
             context.SaveChanges();
             status = obj.Id;
         }
         return(status);
     }
     catch
     {
         return(-1);
     }
 }