ttaudio.TaskForm.TaskForm_FormClosing C# (CSharp) Method

        private void TaskForm_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (!task.IsCompleted)
            {
                if (!cancellationTokenSource.IsCancellationRequested)
                {
                    Cancel();
                }
                e.Cancel = true;
                return;
            }

            appender.Close();
            ((Hierarchy)log4net.LogManager.GetRepository()).Root.RemoveAppender(appender);
        }