prsm 复杂对象改变，通知View的方法

viewmodel对象的属性改变时，可以使用RaisePropertyChagned通知View

private void Execute_OpenPickerMemberCommand()
{
    _dialogService.ShowDialog(DialogNames.MemberPickerDialog, null, r =>
    {
        if (r.Result != ButtonResult.OK) return;
        var member = r.Parameters.GetValue<MemberModel>("SelectedData");

        PrjModel.Owner = member.Id;
        PrjModel.OwnerName = member.Name;

        this.RaisePropertyChanged(nameof(PrjModel));
    });
}