What is the difference between a static class and an instance class?

What is the difference between a static class and an instance class?

A static class cannot be instantiated and is used for static members, while an instance class can be instantiated and holds instance members.

Can you give me an example of when to use a static class?

Sure! Use a static class for utility functions, like a Math class that provides methods for calculations without needing an object.

Are there any limitations to using static classes?

Yes, static classes cannot implement interfaces or inherit from other classes, and they cannot have instance members.

What about memory usage? Is one better than the other?

Static classes can be more memory efficient since they don't require object instantiation, but instance classes offer more flexibility.