C# 字符串替换，实现关键字高亮显示

	public string ReplaceStr(string source, string keyword)
	{
		string resultStr = "";
		string[] splitStrArr = source.Split(new[] { keyword }, StringSplitOptions.RemoveEmptyEntries);

		string temp = string.Format("{0}", keyword);
		resultStr = string.Join(temp, splitStrArr);

		return resultStr;

	}