Factory method pattern

Author: anupavanm

DesignPatterns.sln

@@ -5,6 +5,8 @@ VisualStudioVersion = 15.0.27004.2009
 MinimumVisualStudioVersion = 10.0.40219.1
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FactoryPattern", "FactoryPattern\FactoryPattern.csproj", "{EC684E1B-EA3F-47FD-8F45-175C56667F13}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "FactoryMethodPattern", "FactoryMethodPattern\FactoryMethodPattern.csproj", "{493DBC90-47D2-49F5-906D-14F3AFDDF9F8}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -15,6 +17,10 @@ Global
 		{EC684E1B-EA3F-47FD-8F45-175C56667F13}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{EC684E1B-EA3F-47FD-8F45-175C56667F13}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{EC684E1B-EA3F-47FD-8F45-175C56667F13}.Release|Any CPU.Build.0 = Release|Any CPU
+		{493DBC90-47D2-49F5-906D-14F3AFDDF9F8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{493DBC90-47D2-49F5-906D-14F3AFDDF9F8}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{493DBC90-47D2-49F5-906D-14F3AFDDF9F8}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{493DBC90-47D2-49F5-906D-14F3AFDDF9F8}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

FactoryMethodPattern/FactoryMethodPattern.csproj

@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp2.0</TargetFramework>
+  </PropertyGroup>
+
+</Project>

FactoryMethodPattern/Program.cs

@@ -0,0 +1,66 @@
+using System;
+
+namespace FactoryMethodPattern
+{
+  interface IInterviewer
+  {
+    void AskQuestions();
+  }
+
+  class Developer : IInterviewer
+  {
+    public void AskQuestions()
+    {
+      Console.WriteLine("Asking about design patterns!");
+    }
+  }
+
+  class CommunityExecutive : IInterviewer
+  {
+    public void AskQuestions()
+    {
+      Console.WriteLine("Asking about community building!");
+    }
+  }
+
+  abstract class HiringManager
+  {
+    // Factory method
+    abstract protected IInterviewer MakeInterviewer();
+    public void TakeInterview()
+    {
+      var interviewer = this.MakeInterviewer();
+      interviewer.AskQuestions();
+    }
+  }
+
+  class DevelopmentManager : HiringManager
+  {
+    protected override IInterviewer MakeInterviewer()
+    {
+      return new Developer();
+    }
+  }
+
+  class MarketingManager : HiringManager
+  {
+    protected override IInterviewer MakeInterviewer()
+    {
+      return new CommunityExecutive();
+    }
+  }
+
+  class Program
+  {
+    static void Main(string[] args)
+    {
+      var devManager = new DevelopmentManager();
+      devManager.TakeInterview(); //Output : Asking about design patterns!
+
+      var marketingManager = new MarketingManager();
+      marketingManager.TakeInterview();//Output : Asking about community building!
+
+      Console.ReadLine();
+    }
+  }
+}