/// <summary>
/// Performs an "exclusive-or" of the two SerializableLists, keeping only the elements that
/// are in one of the SerializableLists, but not in both. The original SerializableLists are not modified
/// during this operation. The result SerializableList is a <c>Clone()</c> of one of the SerializableLists
/// (<c>a</c> if it is not <c>null</c>) containing
/// the elements from the exclusive-or operation.
/// </summary>
/// <param name="a">A SerializableList of elements.</param>
/// <param name="b">A SerializableList of elements.</param>
/// <returns>A SerializableList containing the result of <c>a ^ b</c>. <c>null</c> if both SerializableLists are <c>null</c>.</returns>
public static SerializableList <T> ExclusiveOr(SerializableList <T> a, SerializableList <T> b)
{
if (a == null && b == null)
{
return(null);
}
else if (a == null)
{
return((SerializableList <T>)b.Clone());
}
else if (b == null)
{
return((SerializableList <T>)a.Clone());
}
else
{
return(a.ExclusiveOr(b));
}
}
/// <summary>
/// Performs a "union" of two SerializableLists, where all the elements
/// in both are present. That is, the element is included if it is in either <c>a</c> or <c>b</c>.
/// The return value is a <c>Clone()</c> of one of the SerializableLists (<c>a</c> if it is not <c>null</c>) with elements of the other SerializableList
/// added in. Neither of the input SerializableLists is modified by the operation.
/// </summary>
/// <param name="a">A SerializableList of elements.</param>
/// <param name="b">A SerializableList of elements.</param>
/// <returns>A SerializableList containing the union of the input SerializableLists. <c>null</c> if both SerializableLists are <c>null</c>.</returns>
public static SerializableList <T> Union(SerializableList <T> a, SerializableList <T> b)
{
if (a == null && b == null)
{
return(null);
}
else if (a == null)
{
return((SerializableList <T>)b.Clone());
}
else if (b == null)
{
return((SerializableList <T>)a.Clone());
}
else
{
return(a.Union(b));
}
}
