public BatchChange(ObservableBatchCollection <T> source)
{
if (source.batch != null)
{
throw new InvalidOperationException("Cannot start a batch before the current batch is finished.");
}
this.source = source;
source.batch = this;
}
private ErrorCollection(ObservableBatchCollection <ValidationError> errors)
: base(errors)
{
this.errors = errors;
}