RichText设置高亮 (未完)

  //RichText添加选区 颜色
        private void ChangeColor(string text, Color color)
        {
            //int s = 0;
            //while ((-1 + text.Length - 1) != (s = text.Length - 1 + this.txtResult.Find(text, s, -1, RichTextBoxFinds.MatchCase | RichTextBoxFinds.WholeWord)))
            //{
            //    this.txtResult.SelectionColor = color;
            //}
            int s = 0;
            //并上 RichTextBoxFinds.WholeWord 就没结果
            while (this.txtResult.Find(text, s, RichTextBoxFinds.MatchCase) > -1)
            {
                s = this.txtResult.Find(text, s, RichTextBoxFinds.MatchCase);
                this.txtResult.Select(s, text.Length);
                this.txtResult.SelectionColor = color;
                s++;
            }

        }