How to create api and how to use in our project

No need of saperate api project... you can add apicontroller same as MVC controller in same project.

Please refer

http://www.c-sharpcorner.com/UploadFile/4b0136/implement-Asp-Net-web-api-2-in-Asp-Net-mvc-5/

Laxmidhar Sahoo8y ago

sir are u use mvc ?

Sagar Pandurang Kap8y ago

There are tutorials available for creating API's,But it depend upon in which language you want to create the API.Below link will provide tutorials for Creating API in major programming languages : -

http://blog.rapidapi.com/2017/10/18/20-tutorials-on-how-to-create-your-own-api-sorted-by-programming-language/