AvalonStudio.Controls.IntellisenseManager.DoComplete C# (CSharp) Method

        private bool DoComplete(bool includeLastChar)
        {
            var caretIndex = editor.CaretIndex;

            var result = false;

            if (intellisenseControl.CompletionData.Count > 0 && intellisenseControl.SelectedCompletion != noSelectedCompletion && intellisenseControl.SelectedCompletion != null)
            {
                result = true;

                if (intellisenseStartedAt <= caretIndex)
                {
                    var offset = 0;

                    if (includeLastChar)
                    {
                        offset = 1;
                    }

                    Dispatcher.UIThread.InvokeTaskAsync(() =>
                    {
                        editor.TextDocument.BeginUpdate();

                        if (caretIndex - intellisenseStartedAt - offset >= 0 && intellisenseControl.SelectedCompletion != null)
                        {
                            editor.TextDocument.Replace(intellisenseStartedAt, caretIndex - intellisenseStartedAt - offset,
                                    intellisenseControl.SelectedCompletion.Title);

                            caretIndex = intellisenseStartedAt + intellisenseControl.SelectedCompletion.Title.Length + offset;

                            editor.CaretIndex = caretIndex;
                        }

                        editor.TextDocument.EndUpdate();
                    }).Wait();

                    CloseIntellisense();
                }
            }

            return result;
        }