using System;

using System.Threading.Tasks;

using System.Net;

using System.Net.Http;

using DalSoft.RestClient;

using Newtonsoft.Json;

using Newtonsoft.Json.Serialization;

public class Program

{

    public async static Task Main()

    {

​

        var client = new RestClient("https://jsonplaceholder.typicode.com", new Config()  

                .SetJsonSerializerSettings(new JsonSerializerSettings { ContractResolver = new CamelCasePropertyNamesContractResolver() }));  

     await client  

        .Resource("users/1").Get()  

        .Verify(user => user.username == "Fail")  

        .Verify<HttpResponseMessage>(response => response.StatusCode == HttpStatusCode.BadRequest)  

        .OnVerifyFailed((aggregateException, response) =>  

         {  

            Console.WriteLine("OnVerifyFailed Called");

         });  

    }

}