using System;
using System.Text.RegularExpressions;

public class Example
{
   public static void Main()
   {
      string input = "<name />";
      string pattern = "<(.*?)\\s*/>";
      string replacement = "<$1></$1>";
      Regex rgx = new Regex(pattern);
      string result = rgx.Replace(input, replacement);

      Console.WriteLine("Original String: {0}", input);
      Console.WriteLine("Replacement String: {0}", result);                             
   }
}