public static StringBuilder sb = new StringBuilder();
public static void Main()
string reverseThis = "Hello World";
char[] array = reverseThis.ToCharArray();
GetLastChar(array, array.Length-1);
Console.WriteLine(sb.ToString());
public static void GetLastChar(char[] reverseThis, int position){
sb.Append(reverseThis[position]);
GetLastChar(reverseThis,position-1);