/// <summary>
/// Retains only the elements in this set that are contained in the
/// specified collection.
/// </summary>
/// <param name="collection">
/// The collection that defines the set of elements to be retained.
/// </param>
/// <returns>
/// <see langword="true" /> if this set changed as a result of this
/// operation.
/// </returns>
public override bool RetainAll(ICollection collection)
{
//Put data from C into a set so we can use the Contains() method.
Set cSet = new HybridSet(collection);
//We are going to build a set of elements to remove.
Set removeSet = new HybridSet();
foreach (var o in this)
{
//If C does not contain O, then we need to remove O from our
//set. We can't do this while iterating through our set, so
//we put it into RemoveSet for later.
if (!cSet.Contains(o))
{
removeSet.Add(o);
}
}
return(RemoveAll(removeSet));
}
public override void SetUp()
{
Set = new HybridSet ();
SetForSetOps = new HybridSet ();
}