Delegate Array in C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ArrayDelegates
{
   public delegate string Delegatearray(string a);

   class Delegate_Array
   {
      static string Str_Reverse(string x)
       {
           string S = new string(x.ToCharArray().Reverse().ToArray());
           return S;
       }

       static string Str_Length(string x)
       {
         string S = Convert.ToString(x.Length);
         return S;
       }

       static void Main(string[] args)
       {
           string call;
           Delegatearray[] Darray = { new Delegatearray(Delegate_Array.Str_Reverse),
                                                          new Delegatearray(Delegate_Array.Str_Length) };
           for (int i = 0; i < Darray.Length; i++)
           {
                call=Darray[i]("C-SHARP");
                Console.WriteLine(call);
           }
               Console.ReadKey();
        }
    }
}