Easy csharp

Uppercase "toolliyo" #11

Problem

Uppercase "toolliyo".

Hints

Ready — edit the code above and click Run.

using System;

class Program
{
    static void Main()
    {
        string s = "toolliyo";
        Console.WriteLine(s.ToUpper());
    }
}

Try solving on your own first, then reveal the official answer.

ToUpperInvariant in production.

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