Dependency Injection extensions

SystemExtensions.NetStandard.DependencyInjection/Configuration/OptionsResolver.cs

@@ -0,0 +1,33 @@
+using Microsoft.Extensions.Options;
+using Slim.Resolvers;
+
+namespace System.Extensions.Configuration
+{
+    public sealed class OptionsResolver : IDependencyResolver
+    {
+        private static readonly Type optionsType = typeof(OptionsWrapper<>);
+        private static readonly Type configurationType = typeof(IOptionsManager);
+
+        public bool CanResolve(Type type)
+        {
+            if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(IOptions<>))
+            {
+                return true;
+            }
+
+            return false;
+        }
+
+        public object Resolve(Slim.IServiceProvider serviceProvider, Type type)
+        {
+            var typedOptionsType = optionsType.MakeGenericType(type.GetGenericArguments());
+            var configurationManager = serviceProvider.GetService<IOptionsManager>();
+            var optionsValue = configurationType
+                .GetMethod(nameof(IOptionsManager.GetOptions))
+                .MakeGenericMethod(type.GetGenericArguments())
+                .Invoke(configurationManager, Array.Empty<object>());
+
+            return Activator.CreateInstance(typedOptionsType, optionsValue);
+        }
+    }
+}