C# vs Lisp

// (write-line
//     (reduce (lambda (x y) (concatenate 'string x y))
//             (list "Hello, " "World!")
//             :initial-value ""))
Console.WriteLine(
    LispObject.CreateList(LispObject.CreateString("Hello, "), LispObject.CreateString("World!"))
    .AsEnumerable()
    .Aggregate(LispObject.CreateString(""), (acc, x) => acc.AppendToString(x))
    .StringValue);