Play with unsafe string

Main.cs

using System;
using System.Runtime.CompilerServices;

namespace SafeString
{
    class Program
    {
        static void Main(string[] args)
        {
            var arr = PlaySafe("Hello World!");

            Console.WriteLine($"LENGTH = {arr.Length}");
            Console.WriteLine($"'{new string(arr)}'");

            Console.WriteLine("START");
            foreach (char a in arr)
                Console.WriteLine(a);
            Console.WriteLine("END");
        }

        private static char[] PlaySafe(string helloWorld) => Unsafe.As<string, char[]>(ref helloWorld);
    }
}