abstract class C#

i have two classes, a base class (A) and a inherited class B. A has a protect function that B can call.
Can Class B have a function with the same name as "SetDefault" with different parameter list,  which say, other public class C can call.
in my example, can I rename someFunction to SetDefault, they have a different parameter list, one has a parameter and other one doesn't. I'm not trying to override function here, just trying to see if it is legal to do in C#.

public abstract class A{
   protected void SetDefault(SomeObject o){
      //do some work
  }
}

public class B : A {
   private SomeObject a;
   public someFunction() {  
       this.SetDefault(a);
   }
}