string rotate(string value)
{
char[] a = value.ToCharArray();
for (int i = 0; i < a.Length; i++)
{
if (LetterUtils.isLetter(a[i]))
{
int t = (int)a[i];
a[i] = _shift[t];
}
}
return(new string(a));
}
char rotateSingleLetter(char letter, int shift)
{
if (!LetterUtils.isLetter(letter))
{
return(letter);
}
if (LetterUtils.isSmallCase(letter))
{
return(rotateSingleSmallCase(doShift(letter, shift)));
}
return(rotateSingleUpperCase(doShift(letter, shift)));
}