Microsoft's statically typed language for .NET

C# Compiler Online — Run C# Code in Your Browser

C# runs on .NET and powers everything from enterprise backends to Windows desktop apps to games built in Unity. It's a close cousin of Java in spirit — strongly typed, object-oriented, with a large standard library.

using System;

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

What people use C# here for

• Practicing C# syntax for a class, certification, or interview
• Testing a LINQ query or small algorithm in isolation
• Trying C# without installing Visual Studio or the .NET SDK

No installs, no signup

Code you write here runs on a real, self-hosted Judge0 execution backend — actual C# compiler or interpreter output, not a simulation. A real .NET runtime executes your code — the same CLR behavior you'd get from Visual Studio, without installing it. See the full list of supported languages or read more about how AnyCompiler works.