ExtensionMethodToExtensionMember 1.0.0

.NET 10.0 This package targets .NET 10.0. The package is compatible with this framework or higher. 
dotnet add package ExtensionMethodToExtensionMember --version 1.0.0
                    


                    

                
NuGet\Install-Package ExtensionMethodToExtensionMember -Version 1.0.0
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="ExtensionMethodToExtensionMember" Version="1.0.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="ExtensionMethodToExtensionMember" Version="1.0.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="ExtensionMethodToExtensionMember" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add ExtensionMethodToExtensionMember --version 1.0.0
                    


                    

                
#r "nuget: ExtensionMethodToExtensionMember, 1.0.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package ExtensionMethodToExtensionMember@1.0.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=ExtensionMethodToExtensionMember&version=1.0.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=ExtensionMethodToExtensionMember&version=1.0.0
                    


                            Install as a Cake Tool

Extension Method → Extension Member Converter

A CLI tool that automatically converts traditional C# extension methods to the new C# 14 extension members syntax using Roslyn.

Before / After

// Before — classic extension method
public static class StringExtensions
{
    public static string Reverse(this string str)
    {
        char[] c = str.ToCharArray();
        Array.Reverse(c);
        return new string(c);
    }
}

// After — C# 14 extension member
public static class StringExtensions
{
    extension(string source)
    {
        public string Reverse()
        {
            char[] c = source.ToCharArray();
            Array.Reverse(c);
            return new string(c);
        }
    }
}

Requirements

  • .NET 10 SDK

Usage

# Single file
dotnet run --project ExtensionMethodToExtensionMember.CommandLine -- path/to/File.cs

# Entire project
dotnet run --project ExtensionMethodToExtensionMember.CommandLine -- path/to/Project.csproj

# Entire solution
dotnet run --project ExtensionMethodToExtensionMember.CommandLine -- path/to/Solution.sln

# Help
dotnet run --project ExtensionMethodToExtensionMember.CommandLine -- -h

Programmatic API

using ExtensionMethodToExtensionMember;

// From file (.cs / .csproj / .sln)
var result = await ExtensionMethodToExtensionMemberApplyer.Apply(new FileInfo("Extensions.cs"));

// From a code string
var result = ExtensionMethodToExtensionMemberApplyer.Apply(csharpCode);
string converted = result.CsharpCode;

Project Structure

Project Description
ExtensionMethodToExtensionMember Core library — Roslyn-based parsing and transformation
ExtensionMethodToExtensionMember.CommandLine CLI entry point
ExtensionMethodToExtensionMember.Tests xUnit tests and test fixtures

Building & Testing

dotnet build
dotnet test
Product Compatible and additional computed target framework versions.
.NET net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
1.0.0 125 2/20/2026