private void OnCreateRequest(RequestDialogViewModel requestDialog)
        {
            var requestEntityId = Application.Repository.CreateRequest(new RequestEntityData
            {
                Date                 = requestDialog.DateProperty.Value,
                Description          = requestDialog.DescriptionProperty.Value,
                Value                = requestDialog.CalculateValue,
                CategoryPersistentId = requestDialog.Categories.Value != null ? requestDialog.Categories.Value.EntityId : null
            });

            var requestViewModel = new RequestViewModel(Application, requestEntityId);

            requestViewModel.Refresh();
            Requests.AddValue(requestViewModel);
            UpdateSaldoForCurrentMonth();
        }