GetHashCode, IEquatable and IComparable Support

operators-overriding.cs

//  IEquatable<T>, IComparable, IComparable<T>

#region GetHashCode, IEquatable and IComparable Support
public override int GetHashCode()
{
    return T?.Id ?? 0 ^ T.Value1 ^ T.Value2;
}

public static bool operator ==(T left, T right)
{
    if (ReferenceEquals(left, null))
    {
        return ReferenceEquals(right, null);
    }
    return left.Equals(right);
}

public static bool operator !=(T left, T right)
{
    return !(left == right);
}

public static bool operator <(T left, T right)
{
    return (Compare(left, right) < 0);
}

public static bool operator >(T left, T right)
{
    return (Compare(left, right) > 0);
}

public static bool operator <=(T left, T right)
{
    return (Compare(left, right) <= 0);
}

public static bool operator >=(T left, T right)
{
    return (Compare(left, right) >= 0);
}

public override bool Equals(object obj)
{
    var other = obj as T;
    if (ReferenceEquals(other, null))
    {
        return false;
    }

    return CompareTo(other) == 0;
}

public bool Equals(T other)
{
    if (ReferenceEquals(other, null))
    {
        return false;
    }

    return CompareTo(other) == 0;
}

public int CompareTo(object other)
{
    if (other == null)
        return 1;

    var session = other as T;

    if (session == null)
        throw new ArgumentException("A T object is required for comparison.", nameof(other));

    if (this == session)
        return 0;

    return CompareTo(session);
}

public int CompareTo(T other)
{
    if (ReferenceEquals(other, this))
    {
        return 0;
    }

    if (ReferenceEquals(other, null))
    {
        return 1;
    }

    return GetHashCode().CompareTo(other.GetHashCode());
}

public static int Compare(T left, T right)
{
    if (ReferenceEquals(left, right))
    {
        return 0;
    }

    if (ReferenceEquals(left, null))
    {
        return -1;
    }

    if (ReferenceEquals(right, null))
    {
        return 1;
    }

    return left.CompareTo(right);
}

public override string ToString()
{
    return string.Format("{0} ID: {1}", GetType().Name, T?.Id);
}
#endregion