StarryEyes.ViewModels.WindowParts.Inputting.InputCoreViewModel.CheckClearInput C# (CSharp) Method

        public bool CheckClearInput(string clearTo = "")
        {
            if (CanSaveToDraft && InputData.IsChanged)
            {
                var action = Setting.TweetBoxClosingAction.Value;
                if (action == TweetBoxClosingAction.Confirm)
                {
                    var msg = _parent.Messenger.GetResponseSafe(() =>
                        new TaskDialogMessage(new TaskDialogOptions
                        {
                            Title = InputAreaResources.MsgSaveToDraftTitle,
                            MainIcon = VistaTaskDialogIcon.Information,
                            MainInstruction = InputAreaResources.MsgSaveToDraftInst,
                            CommonButtons = TaskDialogCommonButtons.YesNoCancel,
                            VerificationText = Resources.MsgDoNotShowAgain,
                            AllowDialogCancellation = true,
                        }));
                    switch (msg.Response.Result)
                    {
                        case TaskDialogSimpleResult.Yes:
                            action = TweetBoxClosingAction.SaveToDraft;
                            break;
                        case TaskDialogSimpleResult.No:
                            action = TweetBoxClosingAction.Discard;
                            break;
                        default:
                            return false;
                    }
                    if (msg.Response.VerificationChecked.GetValueOrDefault())
                    {
                        Setting.TweetBoxClosingAction.Value = action;
                    }
                }
                switch (action)
                {
                    case TweetBoxClosingAction.Discard:
                        break;
                    case TweetBoxClosingAction.SaveToDraft:
                        ClearInput(clearTo, true);
                        return true;
                    default:
                        throw new InvalidOperationException("Invalid return value:" + action);
                }
            }
            ClearInput(clearTo);
            return true;
        }

 public void CloseInput()
 {
     if (!IsOpening)
     {
         return;
     }
     if (InputCoreViewModel.CheckClearInput())
     {
         // reset tab-account synchronization
         AccountSelectorViewModel.SynchronizeWithTab();
         // close
         IsOpening = false;
     }
     // move focus to timeline
     MainWindowModel.SetFocusTo(FocusRequest.Timeline);
 }