Yet another way to do this. This might not be as short the other alternates and might not look elegant, but at least it only needs two int variables and doesn't create any extra objects (reference types)
bool IsPalindrome(string stringToCheck, bool ignoreCase)
{
if (string.IsNullOrEmpty(stringToCheck))
return false;
for (int i = 0, j = stringToCheck.Length - 1; i < j; ++i, --j)
{
if (ignoreCase)
{
if (char.ToLowerInvariant(stringToCheck[i]) != char.ToLowerInvariant(stringToCheck[j]))
return false;
}
else
{
if (stringToCheck[i] != stringToCheck[j])
return false;
}
}
return true;
}
EDIT: Changed !Equals to !=
