public WeakKeyReference(T key, WeakKeyComparer <T> comparer)
: base(key)
{
// retain the object's hash code immediately so that even if the target is GC'ed we will
// be able to find and remove the dead weak reference.
HashCode = comparer.GetHashCode(key);
}
public WeakDictionary(int capacity, IEqualityComparer <TKey> comparer)
{
this.comparer = new WeakKeyComparer <TKey>(comparer);
dictionary = new Dictionary <object, TValue>(capacity, this.comparer);
}