C# Tutorial

Learn C# programming language with this comprehensive C# tutorial series. From beginner to advanced topics, It covers everything you need to know to become proficient in C# programming.

C# 12 New Features in 2025: What’s New with .NET 8

Hey there, fellow coders. As a software engineer and blogger, I’m always excited to dive into the latest tools and features that make our lives easier and C# 12 with .NET 8 in 2025 does not disappoint.
In this article, I’ll walk you through the top C# 12 new features released alongside .NET 8 in November 2023.
So, what’s the big deal? C# 12 simplifies syntax, reduces boilerplate code, boost performance, and introduces features that make your codebase cleaner, more expressive and ultimately make your applications more modern and flexible.

Let’s dive into what’s new in 2025 and why you should care.

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Difference Between WCF and Web API with Examples: A Comprehensive Guide

As a software engineer, you’ve likely encountered scenarios where you need to build services to connect applications or expose functionality over the web. Two popular Microsoft technologies for this are Windows Communication Foundation (WCF) and ASP.NET Web API. But what’s the real difference between WCF and Web API?

When should you use one over the other? In this article, I’ll break it down for you with examples, a comparison table, and practical insights straight from my experience as a developer.

Let’s dive in and explore these technologies step by step.

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Difference Between Array And ArrayList In C#: Choosing the Right Collection

Last updated on September 6th, 2024 at 02:17 pm

In this article, we will learn the basic difference between array and ArrayList in C#. It will help you make informed decisions for your C# projects.

This image has an empty alt attribute; its file name is Array_vs_ArrayList_in_csharp.png

C# Array

An array is a strongly type collection of elements of the same data type. It has a fixed length that cannot be changed during runtime.

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How to remove special characters from a string in C#

Last updated on January 19th, 2024 at 12:08 am

Understanding the Challenge

Before diving into the code, let’s grasp the concept of special characters. Special characters are those that fall outside the realm of alphanumeric characters. 

They include symbols like '@', '#', '$', '%', and more. The goal is to create a C# program that efficiently removes these special characters from a given string and allowed characters are A-Z (uppercase or lowercase) and numbers (0-9).

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Understanding List vs Dictionary in C# With Examples

Last updated on November 16th, 2023 at 10:14 am

When it comes to working with collections in C#, you’ll often find yourself deciding between using a List or a Dictionary, as both serve for storing and managing data and belong to System.Collection.Generics namespace.

In this article, we’ll discuss List vs Dictionary in C# with Examples and will understand when to use each and why.

list vs dictionary in csharp

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Understanding the Difference Between Overriding and Overloading in C#

Last updated on December 20th, 2023 at 06:19 pm

Overriding and Overloading the two important concepts of Polymorphism. 

Overloading in C# is known as Static Polymorphism or Compile time Polymorphism. In Overloading we can create methods with the same name but different parameters within the same class.

On the other hand, Overriding is known as dynamic Polymorphism or Runtime Polymorphism which allows us to provide different implementation of a method in Inherited Classes.

In this article, we will learn the differences between overriding and overloading in C# with practical code examples.

Overriding and Overloading in C#

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

Last updated on September 1st, 2023 at 07:53 pm

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

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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#

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Understanding C# Abstract Class With Examples

Last updated on August 26th, 2023 at 02:24 am

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.

csharp-abstract-class

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C# do while Loop: A Beginner’s Guide

In C# programming, the do while loop is a control flow statement that allows you to execute a code block based on a condition repeatedly. 

In this article, we will explore the C# do while loop, its syntax, and working principle and provide practical examples to help students and professionals to grasp its concepts easily.

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Understanding the C# While Loop: A Beginner’s Guide

Introduction: In the programming world, loops play an important role in executing a set of instructions repeatedly. One such loop that you’ll frequently encounter is the “while loop.” 

In this article, we will explore the C# while loop and understand how it works, its syntax, practical examples, and when to use it effectively.

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