DoSomething

Public class DoSomething : IDoSomething
{
	public void DoSomethingCool()
	{
		//Do Something Cool
	}
}

DoSomethingElse

Public class DoSomethingElse : IDoSomething
{
	public void DoSomethingCool()
	{
		// Do Something Else Cool
	}
}

IDoSomething

public interface IDoSomething
{
	void DoSomethingCool();
}

UseADoSomething

Public class UseADoSomething
{
	private IDoSomething doSomething;
	
	public void Initialize(IDoSomething doSomething)
	{
		this.doSomething = doSomething
	}
	
	public void CallADoSomething()
	{
		doSomething.DoSomethingCool();
	}
}

If needed other classes can inherit UseADoSomething and override methods, if the logic for when something cool happens needs to be different.