using System;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

    var text = @"

{

    ""status"": 200,

    ""code"": 3,

    ""message"": ""SUCCESS"",

    ""content"": [

        {

            ""targetLocationCode"": ""TRUCK"",

            ""requestDate"": ""2022-07-18T00:00:00+08:00"",

            ""containers"": [

                {

                    ""cntrNbr"": ""SOCT0731229"",

                    ""cntrCycleId"": ""5579250""

                },

                {

                    ""cntrNbr"": ""SOCT0731230"",

                    ""cntrCycleId"": ""5579378""

                },

                {

                    ""cntrNbr"": ""SOCT0731231"",

                    ""cntrCycleId"": ""5579352""

                }

            ],

            ""jobs"": [],

            ""requestNbr"": ""SSR979111940375"",

            ""customerCode"": ""CFST0001"",

            ""customerName"": ""CFST0001"",

            ""deadline"": ""2022-07-18T23:59:59.999+08:00"",

            ""requestBy"": ""SOKZQ02"",

            ""invoiceOptionCode"": ""PREPAID"",

            ""requestStatusCode"": ""APPROVED"",

            ""requestTypeCode"": ""DEVANNING"",

            ""vesselVisitCode"": ""SOKR7207"",

            ""requestByCode"": ""BOL"",

            ""requestByNbr"": ""SAT15JULP02"",

            ""cargoServiceRequestDetail"": [

                {

                    ""docNbr"": ""SAT15JULP02"",

                    ""docTypeCode"": ""BOL""

                }

            ],

            ""requestTypeName"": ""Stripping"",

            ""additionalServices"": [],

            ""inventoryDetails"": [],

            ""docDetails"": [

                {

                    ""bolNbr"": ""SAT15JULP02"",

                    ""releasedQty"": 0,

                    ""docNbr"": ""SAT15JULP02"",

                    ""docTypeCode"": ""BOL""

                }

            ],

            ""truckVisits"": []

        }

    ],

    ""responseDetail"": {

        ""errorDetail"": [],

        ""warningDetail"": [],

        ""validationDetail"": [],

        ""infoDetail"": [],

        ""successDetail"": [

            {

                ""message"": ""Request fetch successfully"",

                ""code"": ""305001107""

            }

        ],

        ""traceId"": ""node1-93a9f59bc358092d""

    }

}

";

        JObject o = JObject.Parse(text);

        var cntrNbr = "SOCT0731231";

        JToken cntrCycle = o.SelectToken("$.content[0].containers[?(@.cntrNbr=='SOCT0731230')].cntrCycleId");

​

        Console.WriteLine(cntrCycle);

    }

}