hello_structuremap.cs

using System;
using StructureMap;

namespace ConsoleApplication1
{
    class Program {
        private static void Main(string[] args) {
            IContainer container = ConfigureDependencies();
            
            IAppEngine appEngine = container.GetInstance<IAppEngine>();
            appEngine.Run();
        }

        private static IContainer ConfigureDependencies() {
            return new Container(x =>{
                x.For<IAppEngine>().Use<AppEngine>();
                x.For<IGreeter>().Use<EnglishGreeter>();
                x.For<IOutputDisplay>().Use<ConsoleOutputDisplay>();
            });
        }
    }

    public class AppEngine : IAppEngine {
        private readonly IGreeter greeter;
        private readonly IOutputDisplay outputDisplay;

        public AppEngine(IGreeter greeter, IOutputDisplay outputDisplay) {
            this.greeter = greeter;
            this.outputDisplay = outputDisplay;
        }

        public void Run() {
            outputDisplay.Show(greeter.GetGreeting());
        }
    }

    public interface IAppEngine {
        void Run();
    }

    public interface IGreeter {
        string GetGreeting();
    }

    public class EnglishGreeter : IGreeter {
        public string GetGreeting() {
            return "Hello";
        }
    }

    public class FrenchGreeter : IGreeter {
        public string GetGreeting() {
            return "Bonjour";
        }
    }

    public interface IOutputDisplay {
        void Show(string message);
    }

    public class ConsoleOutputDisplay : IOutputDisplay {
        public void Show(string message) {
            Console.WriteLine(message);
        }
    }
}