生成并返回 json 结果文件

#region 生成并返回 json 结果文件
/// <summary>
/// 生成并返回 json 结果文件
/// </summary>
/// <param name="json">主内容</param>
/// <param name="argus">其它参数</param>
/// <param name="flag">标志</param>
/// <param name="mess">结果</param>
/// <returns></returns>
public static string BackJson(string flag, string json, string mess)
{
    StringBuilder strback = new StringBuilder();
    strback.Append("{"flag":"" + flag + "","msg":"" + mess + """);
    strback.Append(json);
    strback.Append("}");
    return strback.ToString();
}
#endregion