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

public class Test
{
    public class MyThing
        {
            public int name { get; set; }
            public string myNumber { get; set; }
        }
    
	public static void Main()
	{
		    var list = new List<MyThing>() { 
                new MyThing{myNumber="12-22"},new MyThing{myNumber="13-01"},new MyThing{myNumber="12-030"} 
            };

            var orderedLikeVersion = list
                .Select(t => new
                {
                    Thing = t,
                    Parts = t.myNumber.Split('-')
                }).Select(x => new
                {
                    x.Thing,
                    Version = new Version(int.Parse(x.Parts[0]), int.Parse(x.Parts[1]))
                })
                .OrderByDescending(x => x.Version)
                .Select(x => x.Thing);
                
                foreach(var thing in orderedLikeVersion)
                   Console.WriteLine(thing.myNumber);
	}
}