private async void AddItem_Clicked(object sender, EventArgs e)
{
Operation Operation = new Operation();
OperationDetailPage OperationPage = new OperationDetailPage();
OperationPage.BindingContext = Operation;
await Navigation.PushAsync(OperationPage);
}
private async void OnItemSelected(object sender, SelectedItemChangedEventArgs e)
{
Operation selectedOperation = (Operation)e.SelectedItem;
OperationDetailPage OperationPage = new OperationDetailPage(selectedOperation);
OperationPage.BindingContext = selectedOperation;
await Navigation.PushAsync(OperationPage);
}
