API for C#?

A beginner in C#, migrated from Java.

Java have an API of their own.

Do C# have one?
.. i desperately need one to assist me in programming & getting the syntax right. I can't rely on books all the time.

 

And that is?

 

Yes i know but i want to know is how do i find these. Like there must be a website or document stating those.

For example: In java there's an API for listing all classes and their functionality.

But what about C#? So far i can't find any..

 

Cheers

Exactly what i was looking for