The following example shows how to use a sortedset in C#. This sample simply prints out the contents of the sorted set. Also note that this class can be used in any project type (ie Net, AspNetCore, etc. The samples use a console application to demonstrate the class.

Using the Class

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

namespace Samples
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("***BEGIN SAMPLE OUTPUT***\n\n");
            SortedSetSample obj = new SortedSetSample();
            obj.Show();


            Console.WriteLine("\n\n***END SAMPLE OUTPUT***");
            Console.ReadLine();
        }
    }
}  // END PROGRAM

The Sorted Set Sample Class

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Diagnostics;

namespace Samples
{
    class SortedSetSample
    {
        private SortedSetlstHumanBeings = new SortedSet(new SortByAge());

      // ---------------------------------
    // sorted set constructor
      // ---------------------------------
      public SortedSetSample()
        {
            human h = new human("bob", "smith", 49);
            lstHumanBeings.Add(h);

            h = new human("tina", "jones", 24);
            lstHumanBeings.Add(h);

            h = new human("biff", "thorn", 31);
            lstHumanBeings.Add(h);

            h = new human("tina", "jones", 16);
            lstHumanBeings.Add(h);

        }

        // ------------------------------------
        // shows the list in the debug window
        // ------------------------------------
        public void Show()
        {
            Console.WriteLine("Output is sorted by Last, First, Age");
            Console.WriteLine("");
            foreach (human h in lstHumanBeings)
            {
                string s = h.last.PadRight(10) +
                           h.first.PadRight(10) +
                           h.age.ToString().PadLeft(10);
                Console.WriteLine(s);
            }
        }



        // --------------------------------
        // human class
        // --------------------------------
        public class human
        {
            public string first { get; set; }
            public string last { get; set; }
            public int age { get; set; }

            // constructor - 0 parameters
            public human()
            {
                first = "";
                last = "";
                age = 0;
            }

            // constructor - 3 parameters
            public human(string p_first, string p_last, int p_age)
            {
                first = p_first;
                last = p_last;
                age = p_age;
            }
        }


        // sort object.  note that the combination of 
        // first, last, and age must be unique
        private class SortByAge : IComparer
        {
            public int Compare(human h1, human h2)
            {
                int rc = string.Compare(h1.last, h2.last);
                if (rc == 0)
                {
                    rc = string.Compare(h1.first, h2.first);

                    if (rc == 0)
                    {
                        rc = h1.age.CompareTo(h2.age);
                    }
                }

                return rc;
            }
        }
    }
}  // END CLASS