Specification Pattern In C# - Composite Specifications

This article is a continuation of my first article on Specification Pattern in C#. I recommend that you read it for a better understanding of background concepts. In the first part of this article, I introduced the specification pattern and how it can help to avoid violating the ‘O’ of SOLID principles of programming. Here, I’ll basically show how two or more specifications can be combined together to achieve more interesting results.

source https://www.c-sharpcorner.com/article/specification-pattern-in-c-sharp/