C#里几种Json字符串特殊字符的转义

/// <summary>
        ///   替换部分字符串
        /// </summary>
        /// <param name="sPassed">需要替换的字符串</param>
        /// <returns></returns>
        public static string ReplaceString(string JsonString)
        {
            if (JsonString == null) { return JsonString; }
            if (JsonString.Contains("\\"))
            {
                JsonString = JsonString.Replace("\\", "\\\\");
            }
            if (JsonString.Contains("\‘"))
            {
                JsonString = JsonString.Replace("\‘", "\\\‘");
            }
            if (JsonString.Contains("\""))
            {
                JsonString = JsonString.Replace("\"", "\\\"");
            }
            //去掉字符串的回车换行符
            JsonString = Regex.Replace(JsonString, @"[\n\r]", "");
            JsonString = JsonString.Trim();
            return JsonString;
        }