Question

I’m learning multi-threading in C# and I saw a code below

static readonly object _locker = new object();

static void Main()
{
  lock (_locker)
  {
     AnotherMethod();
     // ...some work is going on
  }
}

static void AnotherMethod()
{
  lock (_locker) { Console.WriteLine ("Another method"); }
}

I wonder when does it require to use nested locking? Why don’t use only one lock in this case?

Answer 1

My first response would be that AnotherMethod can be called directly, not going through the Main method, so therefor you might need nested locking.