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")  

          .OnVerifyFailed<HttpResponseMessage>((aggregateException, response) =>  

          {   

              Console.WriteLine(aggregateException.InnerExceptions.Count);  // Callback invoked if the Verify above fails  

          }, throwOnVerifyFailed: false)

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

          .OnVerifyFailed<HttpResponseMessage>((aggregateException, response) =>  

          {  

             Console.WriteLine(aggregateException.InnerExceptions.Count);  // Because the previous OnVerifyFailed set throwOnVerifyFailed to false callback only invoked if above Verify failure  

          }, throwOnVerifyFailed: true)  

          .Verify(response => response.username == "Peter")  

          .OnVerifyFailed((aggregateException, response) =>  

          {  

             // Because the previous OnVerifyFailed set throwOnVerifyFailed to true callback invoked if the above Verify and previous Verify fails aggregateException contains above Verify and previous Verify failures  

             Console.WriteLine(aggregateException.InnerExceptions.Count);  

          }, throwOnVerifyFailed: true);  

        // Last OnVerifyFailed set throwOnVerifyFailed to true so an exception will be thrown this will contain both the above and previous Verify failures, but not the first failure as throwOnVerifyFailed was set to false   

    }

}