C#：让控件TextBox的滚动条保持在最下方

//该事件让TextBox控件的滚动条始终保持在最下方
        private void TextBox_TextChanged(object sender, EventArgs e)
        {
            this.TextBox.SelectionStart = this.TextBox.Text.Length;
            this.TextBox.SelectionLength = 0;
            this.TextBox.ScrollToCaret();
        }