public virtual bool Contains(object o)
{
try
{
IntrusiveCollection.Element element = (IntrusiveCollection.Element)o;
return(element.IsInList(this));
}
catch (InvalidCastException)
{
return(false);
}
}
public virtual bool Remove(object o)
{
try
{
IntrusiveCollection.Element elem = (IntrusiveCollection.Element)o;
if (!elem.IsInList(this))
{
return(false);
}
RemoveElement(elem);
return(true);
}
catch (InvalidCastException)
{
return(false);
}
}
/// <summary>Add an element to the front of the list.</summary>
/// <param name="elem">The new element to add.</param>
public virtual bool AddFirst(IntrusiveCollection.Element elem)
{
if (elem == null)
{
return(false);
}
if (elem.IsInList(this))
{
return(false);
}
IntrusiveCollection.Element next = root.GetNext(this);
next.SetPrev(this, elem);
root.SetNext(this, elem);
elem.InsertInternal(this, root, next);
size++;
return(true);
}