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Version 3 (Current):

Version 2 (Previous):

Model your command line application interface in a class

The purpose of this framework is to let developers focus on the core logic of command line application by defining commands with methods and arguments with parameters.

Out-of-the-box support for help documentation, subcommmands, dependency injection, validation, piping, prompting, passwords, response files and more.

Includes test tools used by the framework to test all features of the framework.

Modify and extend the functionality of the framework through configuration and middleware.


public class Calculator
    public void Add(int value1, int value2)
        Console.WriteLine($"Answer:  {value1 + value2}");

    public void Subtract(int value1, int value2)
        Console.WriteLine($"Answer:  {value1 - value2}");
class Program
    static int Main(string[] args)
        return new AppRunner<Calculator>().Run(args);

With these two classes, we’ve defined an Add and Subtract command and help is automatically generated.

$ dotnet calc.dll -h
Usage: dotnet calc.dll

Usage: dotnet calc.dll [command]



Use "dotnet calc.dll [command] --help" for more information about a command.

$ dotnet calc.dll Add -h
Usage: dotnet calc.dll Add [arguments]


  value1  <NUMBER>

  value2  <NUMBER>

$ dotnet calc.dll Add 40 20
Answer: 60

Check out the docs for more examples

Credits 🎉

Special thanks to Drew Burlingame for continuous support and contributions