PseudoCodeProgram.cs

using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;
using Orleans;
using Orleans.ApplicationParts;
using Orleans.Configuration;
using Orleans.Hosting;
using Orleans.Runtime;

namespace OrleansHost
{
    class Program
    {
        static async Task Main(string[] args)
        {
            // Configure the silo host
            var siloHostBuilder = new SiloHostBuilder()
                .Configure<ClusterOptions>(
                    options =>
                    {
                        options.ClusterId = hostConfig.DeploymentId;
                        options.ServiceId = hostConfig.DeploymentId;
                    })
                    // etc... silo config
                .EnableDirectClient(); // Not needed in Orleans 2.3.0 & above
            var silo = siloHostBuilder.Build();

            // Start the silo
            await silo.StartAsync();

            var webHost = new WebHostBuilder()
                .ConfigureServices(
                    services =>
                    {
                        // These are the important lines
                        services.AddSingleton(sp => silo.Services.GetRequiredService<IClusterClient>());
                        services.AddSingleton(sp => silo.Services.GetRequiredService<IGrainFactory>());
                    })
                .UseStartup<WebHostStartup>()
                .Build();

            await webHost.StartAsync();

            // TODO: support a shutdown signal.
            await Task.Delay(-1, CancellationToken.None);
        }
    }
}