Online C# Compiler — write, compile & run C#

C# compiles to .NET assemblies and needs a runtime to execute — not something a browser provides. The server compiles your code and runs it, returning Console.WriteLine output. Use a class with a static Main method as the entry point.

When you press Run, your C# code is sent to a sandboxed execution service that compiles and runs it in an isolated environment, then returns the output. It does notrun on induwara.lk's servers — our site only proxies the request, so your code can never touch our systems, files, or other users. Languages like C#need a real compiler/runtime, which isn't practical in a browser, so this is the safe way to offer them.

The proxy is strictly bounded: a 30-second execution limit, a 50 KB code cap, and per-IP plus global rate limits that protect the shared compiler. There's no signup and nothing to install — write code, hit Run, read the output.

• Microsoft Learn — C# documentation
• Wandbox — the sandboxed compiler service used to run your code

Compilation + execution happen on Wandbox's isolated servers; induwara.lk only proxies the request with rate limits and caps.