elsa-core/src/samples/console/Elsa.Samples.SwitchConsole/Program.cs

using System.Threading.Tasks;
using Elsa.Services;
using Microsoft.Extensions.DependencyInjection;

namespace Elsa.Samples.SwitchConsole
{
    /// <summary>
    /// Demonstrates a workflow with a While looping construct.
    /// </summary>
    static class Program
    {
        private static async Task Main()
        {
            // Create a service container with Elsa services.
            var services = new ServiceCollection()
                .AddElsa(options => options
                    .AddConsoleActivities()
                    .AddWorkflow<GrayscaleWorkflow>())
                .BuildServiceProvider();

            // Run startup actions (not needed when registering Elsa with a Host).
            var startupRunner = services.GetRequiredService<IStartupRunner>();
            await startupRunner.StartupAsync();

            // Get a workflow runner.
            var workflowRunner = services.GetRequiredService<IWorkflowRunner>();

            // Execute the workflow.
            await workflowRunner.RunWorkflowAsync<GrayscaleWorkflow>();
        }
    }
}