using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var hashSet = new HashSet<TestClass>();

        var test1 = new TestClass { Name = "Name", Address = "Address" };

        var test2 = new TestClass { Name = "Name", Address = "Address" };

        hashSet.Add(test1);

        hashSet.Add(test2);

        foreach (var test in hashSet) {

            Console.WriteLine(test.Name);

        }

    }

}

​

public struct TestClass {

    public string Name {get; set;}

    public string Address {get; set;}

}