Request for a sample

[abhidotnet]

This issue is a: (mark with an x)

• [ ] bug report
• [x] request for new sample
• [ ] documentation issue or request
• [ ] regression (a behavior that used to work and stopped in a new release)

Is there any sample where I can authenticate a user against Azure AD and then get a bearer token? I need an example in C#. I plan to use this bearer token to access a Web API.