public FWList(T itemZero, T itemOne)
{
// Reverse order when constructing block because the second argument is
// conceptually added second, so it will be at index [0].
Block = new VListBlockOfTwo <T>(itemOne, itemZero, true);
LocalCount = 2;
}
} // empty list is all null
public WList(T itemZero, T itemOne)
{
Block = new VListBlockOfTwo <T>(itemZero, itemOne, true);
LocalCount = 2;
}