System.Windows.Data.ListCollectionView.UpdateCanAddNewAndRemove C# (CSharp) Method

		void UpdateCanAddNewAndRemove ()
		{
			var value = ItemConstructor != null && !SourceCollection.IsFixedSize && !IsEditingItem;
			if (value != CanAddNew)
				CanAddNew = value;

			value = !SourceCollection.IsFixedSize && !IsEditingItem && !IsAddingNew;
			if (value != CanRemove)
				CanRemove = value;
		}