Service Locator IoC in Azure Function

MyFirstFunctionWithIoC.cs

    public interface IWireCharacterFactory {
        string GetWireCharactor();
    }

    public class TheBestWireCharacterFactory : IWireCharacterFactory {
        public string GetWireCharactor() {
            return "Bodie"; //Because he was.
        }
    }

    public static class MyFirstFunction
    {
        [FunctionName("MyFirstFunction")]

        private static IServiceLocator ServiceLocator = new ServiceLocator();

        static MyFirstFunction() {
            ServiceLocator.Register<IWireCharacterFactory>(new TheBestWireCharacterFactory());
        }

        public static async Task<IActionResult> Run(
            [HttpTrigger(AuthorizationLevel.Function, "get", Route = null)] HttpRequest req,
            ILogger log)
        {
            log.LogInformation("C# HTTP trigger function processed a request.");

            var factory = ServiceLocator.Resolve<IWireCharacterFactory>();
            string name = factory.GetWireCharactor();

            return name != null
                ? (ActionResult)new OkObjectResult($"Hello, {name}")
                : new BadRequestObjectResult("Something was really wrong.");
        }
    }

ServiceLocator.cs

    public interface IServiceLocator {

        //This is real bad, don't use this
        //There's so much missing from this

        void Register<T>(T t);
        T Resolve<T>();
    }

    public class ServiceLocator : IServiceLocator
    {
        //This is worse than the above interface. Seriously, don't use this

        private readonly Dictionary<Type, object> _types = new Dictionary<Type, object>();

        public void Register<T>(T t)
        {
            _types.Add(typeof(T), t);
        }

        public T Resolve<T>()
        {
            var obj = _types[typeof(T)];
            return (T)obj;
        }
    }