CTE in SQL Server: Learn Common Table Expressions with Examples

CTE in SQL simplifies complex queries to make code more readable and provides a structured way to work with temporary result sets. 

In this article, we will explore what CTE is, its syntax, examples, why we need it, its types, advantages, and disadvantages of Common Table Expression (CTE), and how to use it in SQL Server.



Static vs Singleton in C#: Understanding the Key Differences

When it comes to managing data and resources in C#, most developers often encounter the need to create and use objects that have a single instance throughout the lifetime of an application. Two common design patterns used for this purpose are Static and Singleton.

In this article, we will explore the differences between these two patterns and their use cases and provide code examples with detailed explanations.



Understanding the C# Interface Segregation Principle (ISP) with Examples

In this article, we will learn about the C# Interface Segregation Principle (ISP), which states that a class should not forced to implement Interface methods they don’t use.

It promotes the creation of focused, smaller, and modular interfaces to prevent clients from implementing methods they don’t need. 

We will learn its significance and how it can be applied using C# code examples.

csharp interface segregation principle


Understanding Covariance and Contravariance in C# – A Comprehensive Guide

The concepts of Covariance and Contravariance in C# might initially sound complex, but fear not! By the end of this article, you’ll have a crystal-clear understanding of how they work and how to leverage them in your C# programming.

“Covariance and Contravariance are terms used in programming languages to describe how subtypes relate to their base types. Covariance is when a derived type can be used where a base type is expected. On the other hand, Contravariance is when a base type can be used where a derived type is expected.

Covariance and contravariance deal with how type conversions are allowed between reference types in C#. These concepts come into play when working with arrays, delegates, and interfaces.

Covariance and Contravariance in C#


Understanding C# Abstract Class With Examples

An abstract class in C# serves as a blueprint for other classes. It cannot be instantiated on its own and is meant to be a base class of other classes. It may contain both abstract and non-abstract members (methods, properties, or events). The abstract members must be implemented by non-abstract derived classes.