public ObservableCollection<ParentModel> ParentCollection { get; set; }

    public List<Parent> ParentList { get; set; }

    public ParentModel ParentModel { get; set; }

    public MainViewModel()
    {
        Load();
    }

    public void Load()
    {
        using (RegistrationEntities registrationContext = new RegistrationEntities())
        {
            ParentList = registrationContext.Parents.ToList();


            for (int i = 0; i < ParentList.Count; i++)
            {
                ParentModel = new ParentModel()
                {
                    PId = ParentList[i].P_Id,
                    PLastName = ParentList[i].P_LastName,
                    PFirstName = ParentList[i].P_FirstName,
                    PMiddleName = ParentList[i].P_MiddleName,
                    PAddress = ParentList[i].P_Address,
                    PContactNo = ParentList[i].P_ContactNo,
                    PEmail = ParentList[i].P_Email,
                    PUsername = ParentList[i].P_Username,
                    PPassword = ParentList[i].P_Password,
                    PCreatedOn = ParentList[i].P_CreatedOn,
                    PUpdatedAt = ParentList[i].P_UpdatedAt
                };

                ParentCollection.Add(ParentModel);
            }
        }
    }