Code style Tip: Case insensitive string comparison

Good
if (String.Compare(myString, ALL_TEXT, StringComparison.OrdinalIgnoreCase) == 0)
                               {
                                        return true;
                               }
OK(not obvious what true means)

if (String.Compare(myString, ALL_TEXT, true) == 0)
                               {
                                        return true;
                               }
BAD: (non null safe)

if (myString.ToLower()==ALL_TEXT.ToLower()
                               {
                                        return true;
                               }