Key Differences Between Abstract Class and Interface in C#

In C#, abstract classes and interfaces are essential concepts, but they have distinct differences:

Abstract Class:

• Can have constructors and destructor methods.
• Can contain implementation code for some methods.
• Can have access modifiers for its members.
• Supports single inheritance.
• Methods can be abstract or non-abstract.

Interface:

• Cannot have constructors or implementation code.
• Only contains method signatures, properties, indexers, and events.
• Members are public by default.
• Supports multiple inheritance.
• All methods in an interface are abstract.

Understanding the differences between abstract classes and interfaces in C# is crucial for designing effective and flexible software solutions.