private void btnMetinSifrele_Click(object sender, EventArgs e)
{
string girilecek_metin = txtGirilecekMetin.Text;
anahtar = txtAnahtar.Text;
stopWatch.Start();
Metin sifrele = new Metin(girilecek_metin, anahtar);
txtSifrelenmisMetin.Text = sifrele.MetinSifreleme();
stopWatch.Stop();
TimeSpan t = stopWatch.Elapsed;
sifrele.Saniye = t.TotalMilliseconds.ToString();
txtCalismaZamani.Text = sifrele.Saniye.ToString();
}
