https://twitter.com/KirillOsenkov/status/1529288974757339136

challenge.cs

using System;
using System.Threading.Tasks;
using System.Linq;

Console.WriteLine("yeah true");

class Keywords {
    public unsafe dynamic select() {
        var var = new int*[] {};
        var set = (IGrouping<int*[], IGrouping<int*[], object>>) null;
        var async = new object[] { 1,2,3 };
        
        return from alias in async where 
            alias is int or not double orderby alias 
            group alias by var into partial
            orderby partial descending 
            join get in set on partial equals get
            select partial is float;
    }
}