Compile and Execute C# Sharp Online

using System.IO;
using System;

class Fibonacci
{

    public Fibonacci() {}
    
    public int getNumber(int number)
    {
        int fib=0;
        int x=0;
        int y=1;
        
        for (int i=0;i<number;i++)
        {
            fib=x+y;
            x=y;
            y=fib;
        }
        return fib;
    }

    static void Main()
    {
        Fibonacci f = new Fibonacci();
        Console.WriteLine(f.getNumber(10));
    }
}