Using lock inside class

Hello!

I have some class and 2 method in it. I want to have thread-safety class, so I need to use lock and some lock object.

And question: Can I use 1 lock object for 2 methods? And if I can't - is there any standard ways to have many lock objects without garbadge in class like this:

class SomeClass
{
//...
private object LockerForMethodA;
private object LockerForMethodB;
private object LockerForMethodC;
private object LockerForMethodD;
}