Hashcode

TestViewModel.cs

using System;
using System.Collections.Generic;
using ReactiveUI;
using ReactiveUI.Fody.Helpers;

namespace WpfApp1
{
    public class TestViewModel : ReactiveObject, IEquatable<TestViewModel>
    {
        public TestViewModel(int ModelId, bool IsArchived)
        {
            this.ModelId = ModelId;
            this.IsArchived = IsArchived;
            this.DisplayName = $"Item #{ModelId}";
        }

        public int ModelId { get;  }
        [Reactive] public string DisplayName { get; set; }
        [Reactive] public bool IsArchived { get; set; }

        public override bool Equals(object obj) => Equals(obj as TestViewModel);
        public bool Equals(TestViewModel other) => other != null && ModelId == other.ModelId;
        public override int GetHashCode() => HashCode.Combine(ModelId);
        public static bool operator ==(TestViewModel left, TestViewModel right) => EqualityComparer<TestViewModel>.Default.Equals(left, right);
        public static bool operator !=(TestViewModel left, TestViewModel right) => !(left == right);
        
    }
}