public override string Decriptare(string textCriptat)
{
string textClar = "";
for (int i = 0; i < textCriptat.Length; i++)
{
if (!char.IsLetter(textCriptat[i]))
{
textClar += textCriptat[i];
}
else
{
char linie = key[i % key.Length];
char original = Util.ShiftLetter(textCriptat[i], -(linie - 'a'));
if (Util.IsUpperCase(textCriptat[i]))
{
textClar += char.ToUpper(original);
}
else
{
textClar += original;
}
}
}
return(textClar);
}
