/// <summary>
/// Removes all items from the <see cref="ObservableMasterSlaveCollection{T}" />.
/// </summary>
/// <returns>An array containing the original collection items.</returns>
/// <remarks>On concurrent collections, this method is write-synchronized.</remarks>
protected override T[] ClearInternal()
{
ThrowIfCurrentObjectDisposed();
T[] originalArray;
using (WriteLock())
{
var container = (MultiListMasterSlaveListAdapter <T>)InternalListContainer;
IncreaseIgnoreMustResetCounter(container.SlavesCount + 1);
originalArray = new T[container.MasterCount];
container.MasterCopyTo(
originalArray,
0);
InternalListContainer.Clear();
PushUndoLevel(new ClearStateChange <T>(originalArray));
}
RaiseCollectionReset();
RaisePropertyChanged(nameof(Count));
ContentsMayHaveChanged();
return(originalArray);
}
