Is there any difference between 'base' and 'this' when referring to the parent object field, property or method?

Question

Consider the following code:

public class Vehicle
{
    public void StartEngine()
    {
        // Code here.
    }
}

public class CityBus : Vehicle
{
    public void MoveToLocation(Location location)
    {
        ////base.StartEngine();
        this.StartEngine();
        // Do other stuff to drive the bus to the new location.
    }
}

Is there any difference between this.StartEngine(); and base.StartEngine();, except that in the second case, StartEngine method cannot be moved to or overridden in CityBus class? Is there a performance impact?

Answer 1

No difference, StartEngine() isn't virtual. You should not use base, in case you ever refactor it to make it virtual. The perf diff is not measurable.