public class MyReferenceType : IEquatable<MyReferenceType>, IComparable, IComparable<MyReferenceType>
{
    public int Property1 { get; private set; }
    public int Property2 { get; private set; }
    public int Property3 { get; private set; }
    public int Property4 { get; private set; }
    public int Property5 { get; private set; }
    public int Property6 { get; private set; }

    public MyReferenceType(int property1, int property2, int property3, int property4, int property5, int property6)
    {
        Property1 = property1;
        Property2 = property2;
        Property3 = property3;
        Property4 = property4;
        Property5 = property5;
        Property6 = property6;
    }

    #region Equality
    public bool Equals(MyReferenceType obj)
    {
        if (ReferenceEquals(null, obj)) return false;
        if (ReferenceEquals(this, obj)) return true;
        return obj.Property2 == Property2;
    }

    public override bool Equals(object obj)
    {
        if (ReferenceEquals(null, obj)) return false;
        if (ReferenceEquals(this, obj)) return true;
        if (obj.GetType() != typeof(MyReferenceType)) return false;
        return ((MyReferenceType)obj).Property1.Equals(Property1);
    }

    public override int GetHashCode()
    {
        unchecked
        {
                return Property3.GetHashCode();
        }
    }
}