public int GetHashCode(object obj)
{
WeakKeyReference <T> weakKey = obj as WeakKeyReference <T>;
if (weakKey != null)
{
return(weakKey.HashCode);
}
return(comparer.GetHashCode((T)obj));
}
public override void Add(TKey key, TValue value)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
WeakReference <TKey> weakKey = new WeakKeyReference <TKey>(key, comparer);
dictionary.Add(weakKey, value);
}
private static T GetTarget(object obj, out bool isDead)
{
WeakKeyReference <T> wref = obj as WeakKeyReference <T>;
T target;
if (wref != null)
{
target = wref.Target;
isDead = !wref.IsAlive;
}
else
{
target = (T)obj;
isDead = false;
}
return(target);
}
protected override void SetValue(TKey key, TValue value)
{
WeakReference <TKey> weakKey = new WeakKeyReference <TKey>(key, comparer);
dictionary[weakKey] = value;
}