public void RunInBackground()
{
if (_cancellationTokenSource == null)
{
_cancellationTokenSource = new CancellationTokenSource();
}
AsyncTaskDispose();
_asyncTask = new CustomAsyncTask(this, _cancellationTokenSource.Token);
_asyncTask.Execute(DocumentTaskType);
}
private void AsyncTaskDispose()
{
_asyncTask?.Dispose();
_asyncTask = null;
}