### Events        

#### ItemChanged
```cs
public event Action<Item> ItemChanged;
```

#### ItemAdded
```cs
public event Action<Item> ItemAdded;
```

#### ItemRemoved
```cs
public event Action<Item> ItemRemoved;
```

#### CollectionChanged
```cs
public event Action CollectionChanged;
```

#### CollectionReset
```cs
public event Action CollectionReset;
```