Thanks for these great posts!

This is a cool way to do the same thing using Extensions:
…
string mystring = “string”;
Console.WriteLine(mystring.Reverse()); //prints “gnirts”
…
public static class Extensions
{
public static string Reverse(this string x)
{
char[] c = x.ToCharArray();
Array.Reverse(c);
return new string(c);
}
}