pageSize.cs

using EnergyCap.Sdk;
using EnergyCap.Sdk.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading;
using System.Threading.Tasks;

namespace SdkDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            Test().Wait();
        }

        public class PagingHandler : DelegatingHandler
        {
            protected async override Task<HttpResponseMessage> SendAsync(
                HttpRequestMessage request, CancellationToken cancellationToken)
            {
                if(request.Headers.Contains("i-pageSize"))
                {
                    var uri = new UriBuilder(request.RequestUri);
                    uri.Query += $"&pageSize={request.Headers.GetValues("i-pageSize").First()}";
                    request.RequestUri = uri.Uri;
                }
                var response = await base.SendAsync(request, cancellationToken);
                return response;
            }
        }

        static async Task Test()
        {
            var httpHandler = new DelegatingHandler[] { new PagingHandler() };
            var client = new EnergyCapApi(httpHandler);
            client.BaseUri = new Uri("https://implement.energycap.com");

            var loginResult = await client.LoginAsync(new LoginRequest()
            {
                DataSource = "ds",
                Username = "un",
                Password = "ps"
            });

            client.HttpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", loginResult.Token);
            var headers = new Dictionary<string, List<string>>() {
                { "i-pageSize", new List<string>(){ "1" } }
            };
            var result = await client.GetPlacesWithHttpMessagesAsync(filter: "", customHeaders: headers);


        }
    }
}