What is the difference between an interface and an abstract class in C#?

What is the difference between an interface and an abstract class in C#?

In C#, an interface defines a contract with no implementation, while an abstract class can provide some implementation.

Can you give me an example of when to use an interface?

Use an interface when you want to define a common behavior for classes that may not share a common ancestor.

And when should I use an abstract class instead?

An abstract class is ideal when you want to share code among closely related classes and still enforce a contract.

Are there any limitations to using interfaces?

Yes, interfaces cannot contain fields or constructors, and all members are implicitly public.