using System;

using System.Text.RegularExpressions;   

​

public class Program

{

    public static void Main()

    {

         var pattern = @"\<.*\>";

         var xml = @"blah blah blah

                                   dsfsdf,<d [john]

                                    ZXZxJohn >Johnson

                                     sdfdsfdsf";

         var match = Regex.Match(xml, pattern, RegexOptions.Multiline | RegexOptions.Singleline);

​

         if (match.Success)

         {

            Console.WriteLine(match.Groups[0]);

         }

    }

}