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C#

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Description #

C# (pronounced “C-sharp”) is a modern, object-oriented programming language developed by Microsoft. It is designed for building secure, scalable applications on the .NET platform, including desktop apps, cloud services, mobile apps, and web applications.

History #

C# was introduced by Microsoft in 2000 as part of the .NET initiative, with Anders Hejlsberg as the lead architect. It was created to combine the power of C++ with the ease of Visual Basic, and to compete with Java. Since its release, C# has evolved through multiple versions, adding features like LINQ, async/await, records, and pattern matching. It remains one of the top languages for enterprise and cross-platform development.

Hello World Code #

using System;

class Program
{
    static void Main()
    {
        Console.WriteLine("Hello, World!");
    }
}

How to Run #

Option 1: Online

Option 2: Local

  1. Install .NET SDK
  2. Run in terminal: 
dotnet new console -o HelloWorld
cd HelloWorld
dotnet run

Key Concepts #

  1. Compiled to Intermediate Language (IL)
  2. Object-oriented
  3. Runs on .NET runtime
  4. Supports LINQ and lambda expressions
  5. Strong static typing
  6. Asynchronous programming with async/await
  7. Garbage collection
  8. Windows Forms, WPF, and MAUI for UI
  9. Cross-platform with .NET Core/.NET 5+
  10. Used for enterprise, game dev (Unity), and mobile apps

Try It Online #

Fun Facts #

  • C# was influenced by Java but introduced many unique features earlier, like LINQ.
  • It’s the primary language used in Unity for game development.
  • C# compiles into Intermediate Language (IL), not directly to machine code — the CLR handles execution.

Resources #

Updated on June 8, 2025

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