/// < summary >
/// Sayinin Faktoryeli Hesaplanacak
/// < / summary >
///< param name="Deger" >< / param >
/// < returns > < / returns >
private Double Faktoryel(int Deger)
{
double Sonuc = 1;
for (int i = 2; i <= Deger; i++)
{
Sonuc *= Deger;
}
return Sonuc;
}

private void Form1_Load(object sender, EventArgs e)
{
int Sayi = 10;
double Hesapla = Faktoryel(Sayi);
this.Text = Hesapla.ToString();
}