using System;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        var json = 

            @"{""Myapplication"": {        

        ""RequestTimeoutAfterXHours"": 24,

        ""Settings"": [

            {

                ""Name"": ""app2"",

                ""MetadataUrl"": ""{{app2}}/mine/.known/configuration"",

                ""ValidateIssuer"": false

            }

        ]

    },

""application"": {

    ""app2"": {

      ""MetadataUrl"": ""{{app2}}/mine/.known/configuration"",

      ""ValidateIssuer"": false

    }

  }}";

        var jobj = JObject.Parse(json);

        var token = jobj.SelectToken("$..Myapplication..MetadataUrl");

        var tokenWithAnySettingsWithMetadataUrl = jobj.SelectToken("$..Myapplication.Settings[*].MetadataUrl");

        var tokenWithFirstSettingsWithMetadataUrl = jobj.SelectToken("$..Myapplication.Settings[0].MetadataUrl");

        Console.WriteLine($"path exist - {token != null}");

        Console.WriteLine($"path with any settings exist - {tokenWithAnySettingsWithMetadataUrl != null}");

        Console.WriteLine($"path with first settings exist - {tokenWithFirstSettingsWithMetadataUrl != null}");

    }

}