Program.cs

using HelloWorld;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;

// Configure the host
using var host = new HostBuilder()
    .UseOrleans(builder => builder.UseLocalhostClustering())
    .Build();

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

// Get the grain factory
var grainFactory = host.Services.GetRequiredService<IGrainFactory>();

// Get a reference to the HelloGrain grain with the key "friend"
var friend = grainFactory.GetGrain<IHelloGrain>("friend");

// Call the grain and print the result to the console
var result = await friend.SayHello("Good morning!");
Console.WriteLine($"""

    {result}

    """);

Console.WriteLine("Orleans is running.\nPress Enter to terminate...");
Console.ReadLine();
Console.WriteLine("Orleans is stopping...");

await host.StopAsync();