Добавил Unity-контейнер

IceCreamShop/IceCreamShopContracts/DI/DependencyManager.cs

@@ -12,7 +12,7 @@ namespace IceCreamShopContracts.DI
 
 		private DependencyManager()
 		{
-			_dependencyManager = new ServiceDependencyContainer();
+			_dependencyManager = new UnityDependencyContainer();
         }
 
 		public static DependencyManager Instance { get { if (_manager == null) { lock (_lockObject) { _manager = new DependencyManager(); } } return _manager; } }

IceCreamShop/IceCreamShopContracts/DI/UnityDependencyContainer.cs

@@ -0,0 +1,37 @@
+using Microsoft.Extensions.Logging;
+using Unity.Microsoft.Logging;
+using Unity;
+
+namespace IceCreamShopContracts.DI
+{
+    public class UnityDependencyContainer : IDependencyContainer
+    {
+        private readonly IUnityContainer _container;
+
+        public UnityDependencyContainer()
+        {
+            _container = new UnityContainer();
+        }
+
+        public void AddLogging(Action<ILoggingBuilder> configure)
+        {
+            var factory = LoggerFactory.Create(configure);
+            _container.AddExtension(new LoggingExtension(factory));
+        }
+
+        void IDependencyContainer.RegisterType<T, U>(bool isSingle)
+        {
+            _container.RegisterType<T, U>(isSingle ? TypeLifetime.Singleton : TypeLifetime.Transient);
+        }
+
+        public void RegisterType<T>(bool isSingle) where T : class
+        {
+            _container.RegisterType<T>(isSingle ? TypeLifetime.Singleton : TypeLifetime.Transient);
+        }
+
+        public T Resolve<T>()
+        {
+            return _container.Resolve<T>();
+        }
+    }
+}

IceCreamShop/IceCreamShopContracts/IceCreamShopContracts.csproj

@@ -8,6 +8,8 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Extensions.Logging" Version="7.0.0" />
+    <PackageReference Include="Unity" Version="5.11.10" />
+    <PackageReference Include="Unity.Microsoft.Logging" Version="5.11.1" />
   </ItemGroup>
 
   <ItemGroup>