crazyCSharping.cs

class Program
{

    static class JsRuntime {
        public static Task InvokeVoidAsync(string name, params object[] args){
            Console.WriteLine($"Running the js function {name} with arguments [{string.Join(", ", args)}]");
            return Task.CompletedTask;
        }
    }
    class VariadicFunc<T>(Func<object[], T> func)
    {
        public T Invoke(params object[] args)
        {
            return func(args);
        }

        public T this[params object[] args] => this.Invoke(args);
    }

    class Thing
    {

        VariadicFunc<Task> func = new VariadicFunc<Task>(args =>
        {
            var sArgs = args.Select(x => x.ToString());
            var j = string.Join(", ", sArgs);
            Console.WriteLine($"You asked for: {j}");
            return Task.CompletedTask;
        });

        public VariadicFunc<Task> this[string name]
        {
            get
            {
                return new VariadicFunc<Task>(
                    args => JsRuntime.InvokeVoidAsync(name, args)
                );
            }
        }

    }

    static async Task Main(string[] args)
    {
        var console = new Thing();
        // await thing["a", "b", true, false];
        // var log = console["log"];
        // await log["Jerky"];
        await console["addEventListener"]["jerky", "monkey"];
        await JsRuntime.InvokeVoidAsync("console.log", "name bro");
        // await JsRuntime.InvokeVoidAsync("console.log", "jake");
    }
}