Delegate factory

PatternDemoCore/PatternDemoCore.csproj

@@ -0,0 +1,12 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Autofac" Version="6.0.0" />
+  </ItemGroup>
+
+</Project>

PatternDemoCore/Program.cs

@@ -0,0 +1,56 @@
+using Autofac;
+using System;
+
+namespace PatternDemoCore
+{
+
+    public class Service
+    {
+        public string DoSomething(int value)
+        {
+            return $"I have {value}";
+        }
+    }
+
+    public class DomainObject
+    {
+        private readonly Service service;
+        private readonly int value;
+
+        public delegate DomainObject Factory(int value);
+
+        public DomainObject(Service service, int value)
+        {
+            this.service = service;
+            this.value = value;
+        }
+
+        public override string ToString()
+        {
+            return service.DoSomething(value);
+        }
+    }
+
+    public class Demo
+    {
+        static void Main(string[] args)
+        {
+            var cb = new ContainerBuilder();
+            cb.RegisterType<Service>();
+            cb.RegisterType<DomainObject>();
+
+            var container = cb.Build();
+            var dobj = container.Resolve<DomainObject>(
+                new PositionalParameter(1, 42));
+            Console.WriteLine(dobj);
+
+            // Better way
+
+            var factory = container.Resolve<DomainObject.Factory>();
+            var dobj2 = factory(42);
+            Console.WriteLine(dobj2);
+
+
+        }
+    }
+}