How to consume a web api with oauth2 authorization using ASP.net MVC?

I've been looking for ways of how to consume a web api with an oauth2 authorization using ASP.Net MVC. Any suggestions?

I have already tried sending a request to the web api and recieve a response. But I'm having a hard time when it involves Oauth2 authorization because i don't know how to send headers like the clientsecret and clientid and also on how to send a raw json data to the web api. I've already tried testing my api on postman and it's working properly.I wanted to know now how can i make an ASP.Net MVC application that can POST and GET to that web api with Oauth2 authorization.