using System;

using System.Linq;

​

namespace ConsoleApp6 {

  class Program {

​

​

    static void Main(string[] args)

    {

      TimeSpan[] hours = new[]

      { new TimeSpan(10, 35, 50),

        new TimeSpan(10, 36, 48),

        new TimeSpan(10, 41, 48),

        new TimeSpan(10, 47, 58),

        new TimeSpan(10, 49, 14),

        new TimeSpan(11, 22, 15),

        new TimeSpan(11, 24, 18),

        new TimeSpan(11, 25, 25), };

      int groupID = -1;

      var result = hours.OrderBy(h => h).Select((item, index) =>

        {

          if (index == 0 || (!(Math.Abs(hours[index - 1].Subtract(item).TotalMinutes) <= 5)))

            ++groupID;

​

          return new { group = groupID, item = item };

        }).GroupBy(item => item.group);

​

      foreach (var grp in result)

      {

        //Console.WriteLine("Group :" + grp.FirstOrDefault().group +1);

        foreach (var item in grp)

          Console.Write(item.item);

        Console.WriteLine("");

      }

​

​

    }

  }

}

​

​