Notes

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace OOP
{
class EgeszSzam
{
int szam;

public EgeszSzam()
{
Szam = 0;
}

public EgeszSzam(int i)
{
Szam = i;
}

public override string ToString()
{
return szam.ToString();
}

virtual public int Szam
{
get { return szam; }
set
{
szam = value;
hex = szam.ToString("X");
piszkos = true;
}
}

private string hex;

public string Hex
{
get { return hex; }
set
{
Szam = int.Parse(value, System.Globalization.NumberStyles.HexNumber);
}
}

private string bin;
private bool piszkos;

public string Bin
{
get
{
if (piszkos)
{
var b = szam;
bin = "";
while (b > 0)
{
if ((b % 2) == 1)
{
bin = "1" + bin;
}
else
{
bin = "0" + bin;
}
b = b / 2;
}
piszkos = false;
}
return bin;
}
set
{
bin = value;
var dec = 0;
foreach (var k in bin)
{
dec *= 2;
if (k == '1')
{
dec++;
}
}
Szam = dec;
piszkos = false;
}
}

}

class KorlatosEgesz : EgeszSzam
{
int also;
int felso;

public KorlatosEgesz(int min, int max)
{
also = min;
felso = max;
Szam = 0;
}

public KorlatosEgesz(int i, int min, int max)
{
also = min;
felso = max;
Szam = i;
}

public override int Szam
{
get
{
return base.Szam;
}

set
{
if (value < also)
{
value = also;
}
else if (value > felso)
{
value = felso;
}
base.Szam = value;
}
}
}

class Program
{
static void Main(string[] args)
{
var e = new KorlatosEgesz(123, 0, 100);
Console.WriteLine("dec={0}, bin={1}, hex={2}", e.Szam, e.Bin, e.Hex);
Console.ReadLine();
}
}
}