System.json Use note

　　Parsing JSON strings in Xamarin with a strange problem when using System.json:

Json-string = {"ret": "OK"}

Use the following code to parse:

        <summary> parse: {"ret": "XXXXX"}///</summary>//        <param name= "Jsonstr" ></param>< c6/>///<returns></returns>        private String Getreturnfromjson (string jsonstr)        {            Jsonvalue jv = Jsonobject.parse (JSONSTR);            return jv["ret"]. ToString ();        }

instead of OK , meaning that there should be no double quotes in the result string. After the removal of  tostring () The result is right, it's strange! Record it.