How to debounce an Entry control in Xamarin

ExtendedEntry.cs

        private Task _debounceTask;

        public ExtendedEntry()
        {
            int debounceDelay = 500;
            CancellationTokenSource _debounceTaskCancellationSource = null;
            TextChanged += (sender, e) =>
            {
                if (_debounceTask != null)
                {
                    _debounceTaskCancellationSource.Cancel();
                    _debounceTaskCancellationSource.Dispose();
                    _debounceTask = null;
                }
                var text = Text;
                _debounceTaskCancellationSource = new CancellationTokenSource();
                _debounceTask = Task.Delay(debounceDelay, _debounceTaskCancellationSource.Token).ContinueWith((task) =>
                {
                    if (_debounceTaskCancellationSource.IsCancellationRequested == false)
                    {
                        if (text.Equals(Text))
                        {
                            DebouncedTextChanged.Invoke(sender, new TextChangedEventArgs(text, Text));
                        }
                    }
                    _debounceTask = null;
                    _debounceTaskCancellationSource.Dispose();
                });
            };
        }

        public event EventHandler<TextChangedEventArgs> DebouncedTextChanged;