TypeExtender 1.0.3

.NET Standard 2.0
dotnet add package TypeExtender --version 1.0.3
NuGet\Install-Package TypeExtender -Version 1.0.3
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="TypeExtender" Version="1.0.3" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add TypeExtender --version 1.0.3
#r "nuget: TypeExtender, 1.0.3"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. Copy this into the interactive tool or source code of the script to reference the package.
// Install TypeExtender as a Cake Addin
#addin nuget:?package=TypeExtender&version=1.0.3

// Install TypeExtender as a Cake Tool
#tool nuget:?package=TypeExtender&version=1.0.3


A light-weight (actually contains one class) library that extends any unsealed type at runtime.

Actions Status Actions Status nuget Nuget

Built by Ndubuisi Jr Chukuigwe


Simply install nuget package and you are ready to zoom off!

Creating a new class

var className = "ClassA";
var typeExtender = new TypeExtender(className);
var returnedType = typeExtender.FetchType();
var obj = Activator.CreateInstance(returnedClass);

Extending an existing class

var className = "ClassA";
var baseType = typeof(List<string>);
var typeExtender = new TypeExtender(className, baseType);
var returnedClass = typeExtender.FetchType();
var obj = Activator.CreateInstance(returnedClass);

Adding CustomAttribute to type

 var typeExtender = new TypeExtender("ClassA");
 typeExtender.AddAttribute<CustomAAttribute>(new object[] { "Jon Snow" });

Adding Properties to type

There are several overloads on the AddProperty method. Few of them are shown below:

var typeExtender = new TypeExtender("ClassA");
typeExtender.AddProperty("IsAdded", typeof(bool));
typeExtender.AddProperty("IsEnabled", typeof(bool), true);
typeExtender.AddProperty<double>("Width", true);

You can add properties with custom attributes

 var attributeType = typeof(CustomAAttribute);
 var attributeParams = new object[] { "Jon Snow" };
 var typeExtender = new TypeExtender("ClassA");
 typeExtender.AddProperty("IsAdded", typeof(bool), attributeType, attributeParams);

Adding Field to Type

The AddField method helps add a field to the type you are creating or extending

  var typeExtender = new TypeExtender("ClassA");
  typeExtender.AddField("IsAdded", typeof(bool)); // first overload
  typeExtender.AddField<bool>("IsEnabled"); // second overload
Product Versions
.NET net5.0 net5.0-windows net6.0 net6.0-android net6.0-ios net6.0-maccatalyst net6.0-macos net6.0-tvos net6.0-windows
.NET Core netcoreapp2.0 netcoreapp2.1 netcoreapp2.2 netcoreapp3.0 netcoreapp3.1
.NET Standard netstandard2.0 netstandard2.1
.NET Framework net461 net462 net463 net47 net471 net472 net48
MonoAndroid monoandroid
MonoMac monomac
MonoTouch monotouch
Tizen tizen40 tizen60
Xamarin.iOS xamarinios
Xamarin.Mac xamarinmac
Xamarin.TVOS xamarintvos
Xamarin.WatchOS xamarinwatchos
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (1)

Showing the top 1 NuGet packages that depend on TypeExtender:

Package Downloads

A dotnet library that allows you to build WebApiEndpoints using a vertical slice architecture approach. Provides a structured way to create REST apis in dotnet without controllers.

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Version Downloads Last updated
1.0.3 23,119 10/11/2021
1.0.2 3,243 8/15/2021
1.0.1 4,892 12/10/2020