public static void Main()
string str="Today is SAturday";
string[] strArr=str.Split(" ");
for(int i=strArr.Length-1;i>=0;i--)
char[] chArr=strArr[i].ToCharArray();
for(int j=chArr.Length-1;j>=0;j--)
Console.WriteLine("Reverse of sentence '"+str+"' is-->"+res);