Something wrong with the testcase results


#1

For the same test case, I ran my code on .net fiddle C# it is giving the result as 1 while here it’s showing my output as 0.
string s = A.ToLower();
StringBuilder sb = new StringBuilder();
foreach(char c in s){
if(Char.IsLetter©)
sb.Append©;
}
s = sb.ToString();
char[] ch = s.ToCharArray();
Array.Reverse(ch);
string t = String.Concat(ch);
return String.Equals(s,t) ? 1: 0;