NSwag is a Swagger 2.0 API toolchain for .NET, TypeScript and other platforms, written in C#. The Swagger specification uses JSON and JSON Schema to describe a RESTful web API. The project provides tools to automatically generate client code from these Swagger specifications and integrate this generation into existing processes.

Ways to use the toolchain:

• Simple to use Windows GUI, NSwagStudio
• In your C# code, via NuGet
• Via command line (Windows, Mac and Linux support through Mono)
• Generate code with T4 templates in Visual Studio

Swagger Generators:

• ASP.NET Web API to Swagger
  • WebApiToSwaggerGenerator
  • WebApiAssemblyToSwaggerGenerator
• Types from .NET assemblies
  • AssemblyTypeToSwaggerGenerator

Code Generators:

• TypeScript Client
  • SwaggerToTypeScriptClientGenerator
  • Available templates/supported libraries:
    • JQuery with Callbacks, JQueryCallbacks
    • JQuery with promises JQueryPromises
    • AngularJS using $http, Angular
    • Angular 2 using the http service, Angular2
• CSharp Client
  • SwaggerToCSharpClientGenerator
  • With INotifyPropertyChanged supporting DTOs
• CSharp WebAPI Controllers (contract first/schema first development)
  • SwaggerToCSharpControllerGenerator
    • Generates Web API Controllers based on a Swagger specification

Downloads

• Download latest NSwagStudio MSI installer (Windows Desktop application)
• Download latest NSwag command line tools and NSwagStudio as ZIP archive
• Download latest Build Artifacts from AppVeyor (command line tools and NSwagStudio binaries)

This project uses NJsonSchema for .NET for JSON Schema, C# and TypeScript class/interface generation.

The following code shows how to read a Swagger specification and generate C# client classes to call the described web services:

var service = SwaggerService.FromJson("...");

var settings = new SwaggerToCSharpClientGeneratorSettings 
{
    ClassName = "MyClass",
    Namespace = "MyNamespace"
};

var generator = new SwaggerToCSharpClientGenerator(service, settings);
var code = generator.GenerateFile();

Check out the project Wiki for more information.

The generators can be used in a comfortable and simple Windows GUI called NSwagStudio: