Anabranch.Neo4JConsolePackage.AutoCompleteBehavior.AutoCompleteBehavior.TextBox_OnPreviewKeyDown C# (CSharp) Method

        private static void TextBox_OnPreviewKeyDown(object sender, KeyEventArgs e)
        {
            if (e.Key != Key.Enter)
                return;

            var tb = e.OriginalSource as TextBox;
            if (tb == null)
                return;

            //If we pressed enter and if the selected text goes all the way to the end, move our caret position to the end
            if (tb.SelectionLength > 0) // && (tb.SelectionStart + tb.SelectionLength == tb.Text.Length))
            {
                var caretShouldgoTo = tb.SelectionStart + tb.SelectionLength;
                tb.SelectionStart = tb.CaretIndex = caretShouldgoTo;
                //tb.SelectionStart = tb.CaretIndex = tb.Text.Length;
                tb.SelectionLength = 0;
            }

            if (e.KeyboardDevice.Modifiers == ModifierKeys.Shift)
            {
                var caretLocation = tb.CaretIndex;
                tb.TextChanged -= OnTextChanged;
                tb.Text = tb.Text.Insert(tb.CaretIndex, Environment.NewLine);
                tb.CaretIndex = tb.SelectionStart = caretLocation + 2;
                tb.TextChanged += OnTextChanged;
            }
        }