Default threading model for a .Net application

Question

I am new to programming, so please pardon me for if the question is a silly one-

I want to know that, in an ordinary C# program where we don't create multi-threads manually in the code, does the whole program run on a single main thread OR there are some other threads created for the execution of program?

Answer 1

From Threading (C#):

By default, a C# program has one thread. However, auxiliary threads can be created and used to execute code in parallel with the primary thread.