Full typing with TypeScript and ASP.Net WebApi

You can also check out NSwag, a Swagger toolchain for .NET and TypeScript.

The tool generates Swagger specs from existing Web API controllers and client code based on these Swagger specs. You can generate TypeScript client code for JQuery with Callbacks or Promises, AngularJS or Angular2. The generated DTOs (request/response types) can either be interfaces or classes (with date conversion, lower camel casing, etc..)

The project can be used with a simple to use desktop GUI, build scripts or a command line tool.

Disclaimer: I'm one of the contributors of NSwag.

Please try Swagger-Codegen, which is a free and open-source code generator to generate REST API clients (e.g. C#, TypeScript, Javascript and more) or server stubs (ASP.NET5) given an OpenAPI/Swagger spec.

Here is a good starting point: https://github.com/swagger-api/swagger-codegen#getting-started

For typescript, Swagger Codegen supports different libraries: typescript-node, typescript-angular, typescript-angular2 and typescript-fetch