RefactoringGuru · neochief · May 29, 2025 · May 24, 2025
diff --git a/AbstractFactory.Conceptual/AbstractFactory.Conceptual.csproj b/AbstractFactory.Conceptual/AbstractFactory.Conceptual.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
diff --git a/Adapter.Conceptual/Adapter.Conceptual.csproj b/Adapter.Conceptual/Adapter.Conceptual.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
diff --git a/Bridge.Conceptual/Bridge.Conceptual.csproj b/Bridge.Conceptual/Bridge.Conceptual.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
diff --git a/Builder.Conceptual/Builder.Conceptual.csproj b/Builder.Conceptual/Builder.Conceptual.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
diff --git a/ChainOfResponsibility.Conceptual/ChainOfResponsibility.Conceptual.csproj b/ChainOfResponsibility.Conceptual/ChainOfResponsibility.Conceptual.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
diff --git a/Command.Conceptual/Command.Conceptual.csproj b/Command.Conceptual/Command.Conceptual.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
diff --git a/Composite.Conceptual/Composite.Conceptual.csproj b/Composite.Conceptual/Composite.Conceptual.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
diff --git a/Decorator.Conceptual/Decorator.Conceptual.csproj b/Decorator.Conceptual/Decorator.Conceptual.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
diff --git a/Directory.Build.props b/Directory.Build.props
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Project>
+  <PropertyGroup>
+    <!-- <TargetFrameworks>netstandard2.0;net8.0</TargetFrameworks> -->
+    <ImplicitUsings>disable</ImplicitUsings>
+    <Nullable>disable</Nullable>
+    <RepositoryUrl>https://github.com/RefactoringGuru/design-patterns-csharp</RepositoryUrl>
+    <RepositoryType>Git</RepositoryType>
+    <EnforceCodeStyleInBuild>True</EnforceCodeStyleInBuild>
+    <AccelerateBuildsInVisualStudio>True</AccelerateBuildsInVisualStudio>
+  </PropertyGroup>
+</Project>
diff --git a/Facade.Conceptual/Facade.Conceptual.csproj b/Facade.Conceptual/Facade.Conceptual.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
diff --git a/FactoryMethod.Conceptual/FactoryMethod.Conceptual.csproj b/FactoryMethod.Conceptual/FactoryMethod.Conceptual.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
diff --git a/Flyweight.Conceptual/Flyweight.Conceptual.csproj b/Flyweight.Conceptual/Flyweight.Conceptual.csproj
@@ -1,9 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Newtonsoft.Json" Version="12.0.1" />
+    <PackageReference Include="System.Text.Json" Version="9.0.5" />
   </ItemGroup>
 </Project>
diff --git a/Flyweight.Conceptual/Program.cs b/Flyweight.Conceptual/Program.cs
@@ -13,11 +13,11 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Text.Json;
 // EN: Use Json.NET library, you can download it from NuGet Package Manager
 //
 // RU: Используем библиотеку Json.NET, загрузить можно через NuGet Package
 // Manager
-using Newtonsoft.Json;
 
 namespace RefactoringGuru.DesignPatterns.Flyweight.Conceptual
 {
@@ -41,8 +41,8 @@ public Flyweight(Car car)
 
         public void Operation(Car uniqueState)
         {
-            string s = JsonConvert.SerializeObject(this._sharedState);
-            string u = JsonConvert.SerializeObject(uniqueState);
+            string s = JsonSerializer.Serialize(this._sharedState);
+            string u = JsonSerializer.Serialize(uniqueState);
             Console.WriteLine($"Flyweight: Displaying shared {s} and unique {u} state.");
         }
     }

diff --git a/Iterator.Conceptual/Iterator.Conceptual.csproj b/Iterator.Conceptual/Iterator.Conceptual.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
diff --git a/Mediator.Conceptual/Mediator.Conceptual.csproj b/Mediator.Conceptual/Mediator.Conceptual.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
diff --git a/Memento.Conceptual/Memento.Conceptual.csproj b/Memento.Conceptual/Memento.Conceptual.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
diff --git a/Observer.Conceptual/Observer.Conceptual.csproj b/Observer.Conceptual/Observer.Conceptual.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
diff --git a/Prototype.Conceptual/Prototype.Conceptual.csproj b/Prototype.Conceptual/Prototype.Conceptual.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
diff --git a/Proxy.Conceptual/Proxy.Conceptual.csproj b/Proxy.Conceptual/Proxy.Conceptual.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
diff --git a/README.md b/README.md
@@ -5,12 +5,12 @@ This repository is part of the [Refactoring.Guru](https://refactoring.guru/desig
 It contains C# examples for all classic GoF design patterns. Each pattern includes two examples:
 
 - [x] **Conceptual** examples show the internal structure of patterns with detailed comments.
-- [ ] **RealWold** examples show how the patterns can be used in a real-world C# application.
+- [ ] **RealWorld** examples show how the patterns can be used in a real-world C# application.
 
 
 ## Requirements
 
-Most examples are console apps built using .NET Core 2.0.
+Most examples are console apps built using C# .NET 8.0.
 
 For the best experience, we recommend working with examples with these IDEs:
 

diff --git a/Singleton.Conceptual/NonThreadSafe/Singleton.Conceptual.NonThreadSafe.csproj b/Singleton.Conceptual/NonThreadSafe/Singleton.Conceptual.NonThreadSafe.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
diff --git a/Singleton.Conceptual/ThreadSafe/Singleton.Conceptual.ThreadSafe.csproj b/Singleton.Conceptual/ThreadSafe/Singleton.Conceptual.ThreadSafe.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
diff --git a/State.Conceptual/State.Conceptual.csproj b/State.Conceptual/State.Conceptual.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
diff --git a/Strategy.Conceptual/Strategy.Conceptual.csproj b/Strategy.Conceptual/Strategy.Conceptual.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
diff --git a/TemplateMethod.Conceptual/TemplateMethod.Conceptual.csproj b/TemplateMethod.Conceptual/TemplateMethod.Conceptual.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>
diff --git a/Visitor.Conceptual/Visitor.Conceptual.csproj b/Visitor.Conceptual/Visitor.Conceptual.csproj
@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 </Project>