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

C# is one of the most in-demand languages in enterprise and campus hiring, but a full Visual Studio install is a heavy way to write your first ten lines. GoCode gives you an online C# compiler — write .NET C# and run it in the browser.

Hello, World in C#

using System;

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

Choose C# in the IDE, paste this, and Run. GoCode builds it on .NET and executes it for you.

Reading input

using System;

class Program {
    static void Main() {
        int n = int.Parse(Console.ReadLine());
        Console.WriteLine(n * n);
    }
}

Put a number in the stdin box and Run to see it squared.

Great for practice

The online compiler is perfect for revising placement topics — collections, LINQ, OOP — without waiting on an IDE to load. Try writing a class, using a List<int>, or a simple LINQ query, and run it instantly.