Difference between Abstract Class and Interface in VB.net

In VB.net, there are key differences between abstract classes and interfaces:

1. Definition: An abstract class is a class that cannot be instantiated on its own and may contain both abstract and non-abstract members. An interface, on the other hand, is a contract that defines the methods and properties that a class must implement.
2. Multiple Inheritance: While a class can inherit from only one abstract class, it can implement multiple interfaces. This allows for more flexibility in designing class hierarchies.
3. Implementation: An abstract class may contain method implementations, while an interface cannot have any implementation details, only method signatures.
4. Access Modifiers: Members of an interface are public by default, while abstract class members can have various access modifiers like public, protected, or private.

Understanding these differences is important when designing classes and interfaces in VB.net.