/// <summary>Under normal circumstances if an item's key changes while it is in the collection it will no longer be accessible. This method provides a way to maintain consistent internal state. No CollectionChanged events are raised (since this method does not alter the collection itself).</summary>
public Task UpdateKeyAsync([NotNull] TItem itemBeingModified, [NotNull] Action actionThatModifiesKey)
{
return(RunOnSynchronizationContext(() => {
BackingDictionary.Remove(GetKeyForItem(itemBeingModified));
actionThatModifiesKey();
BackingDictionary.Add(GetKeyForItem(itemBeingModified), itemBeingModified);
}));
}
/// <summary>
/// <see cref="Dictionary{TKey,TValue}.Remove(TKey)"/>
/// </summary>
public Task <bool> RemoveKeyAsync([NotNull] TKey key)
{
return(RunOnSynchronizationContext(() => {
if (TryGetValue(key, out var item))
{
BackingDictionary.Remove(key);
OnCollectionRemoved(item);
return true;
}
return false;
}));
}
private void InternalRemoveAll(IEnumerable <TItem> enumerable)
{
var removedItems = enumerable.Where(item => BackingDictionary.Remove(GetKeyForItem(item))).ToList();
OnCollectionRemoved(removedItems);
}
