Ternary Operator, C#

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Aa{
        private string _a;
        public Aa(int i){_a=i.ToString("D10");}
        public static implicit operator string(Aa a){return a._a;}
        public static implicit operator Bb(Aa a){return new Bb(int.Parse(a._a));}
        public override string ToString(){return _a;}
    }
    public class Bb{
        private int _b;
        public Bb(int i){_b=i;}
        public override string ToString(){return _b.ToString("D5");}
    }
    public class Program
    {
        public static void Main(string[] args)
        {
            Aa a1=new Aa(11), a2=new Aa(22);
            int z;
            
            Console.WriteLine(2 > 1 ? a1 : "-5"); // prints 11 w/ zeroes
            Console.WriteLine(2 > 1 ? a2 : new Bb(-6)); // prints 22 w/ zeroes
            Console.WriteLine(2 > 1 ? z=33 : -7); // prints 33
            Console.WriteLine("----------");
            Console.WriteLine(2 < 1 ? a1 : "-5"); // prints -5
            Console.WriteLine(2 < 1 ? a2 : new Bb(-6)); // prints -6 w/ zeroes
            Console.WriteLine(2 < 1 ? z=33 : -7); // prints -7
            Console.WriteLine("----------");
            Console.WriteLine("# {0} # {1} # {2} #",a1,a2,new Bb(33));
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,12 sec, absolute running time: 0,09 sec, cpu time: 0,09 sec, average memory usage: 12 Mb, average nr of threads: 3