Signum.Windows.AutocompleteTextBox.IsTextChangingKey C# (CSharp) Метод

        bool IsTextChangingKey(Key key)
        {
            if (key == Key.Space || key == Key.Delete || key == Key.Back)
                return true;

            if (Key.A <= key && key <= Key.Z)
                return true;

            if (Key.D0 <= key && key <= Key.D9)
                return true;
            
            if (Key.NumPad0 <= key && key <= Key.NumPad9)
                return true;

            if (Key.Multiply <= key && key <= Key.Divide)
                return true;

            if (Key.OemSemicolon <= key && key <= Key.Oem102)
                return true;

            return false;
        }