In object-oriented programming, a mixin is a type that contains methods for use by other classes without having to be the parent class of those other classes. C# does not natively support mixins, but developers have devised various ways to mimic this functionality.

Pros:

1. Code Reusability: Mixins can encapsulate behaviour that can be reused across different classes. It promotes the DRY (Don’t Repeat Yourself) principle.

2. Code Organization: Mixins allow us to separate different functionalities into different classes, making the code easier to read and maintain.

3. Flexibility: Unlike inheritance, where a class can only inherit from a single class, a class can mix in multiple other classes, providing more flexibility.

4. Avoiding Class Explosion: In languages or scenarios where multiple inheritances are not allowed or lead to complexity, mixins can add class functionality without creating new subclasses for every possible combination of behaviours.

I want to talk about one of the most exciting new features in C# 9. A way to generate the source code you want and access it instantly in your editor. Stay tuned.

I want to introduce a high-performance, extensible argument validation library.

Guard is a fluent argument validation library that is intuitive, fast and extensible. Guard takes advantage of almost all the new features introduced in C# 7.2.

A collection of awesome .NET libraries, tools, frameworks, and software that I suggest you try!