C # differences between heavy load and override

I haven't looked at object-oriented development for a long time. I have returned many conceptual things to books. Today I have posted some posts on some forums on google, follow the examples of high people to familiarize themselves with the differences between heavy load and coverage:
When you inherit an object-oriented class, you need to reuse methods in the class. You can reload or reuse these methods. During the reload, the names of methods are the same, but the new keyword must be added before the method, the override prefix must be added to the method for reuse:
Public class Class2: Class1
{
Public new void OverloadableFunction ()
{......}
Public override void OverridableFunction ()
{......}
}
Overload: it can be understood that the subclass method can implement different functions from the parent class, but it can

Author: Meng Rui Studio"