/// <summary>
/// Returns a hash code for this instance.
/// </summary>
/// <returns>
/// A hash code for this instance, suitable for use in hashing algorithms and data structures like a hash table.
/// </returns>
public override int GetHashCode()
{
if (this.HasOne)
{
return(HashCode.Of(this.item));
}
else if (this.HasMany)
{
return(HashCode.OfEach(this.collection));
}
return(0);
}
