/// <inheritdoc />
public virtual Task <long> EstimatedDocumentCountAsync(EstimatedDocumentCountOptions options = null, CancellationToken cancellationToken = default(CancellationToken))
{
throw new NotImplementedException();
}
public override Task <long> EstimatedDocumentCountAsync(EstimatedDocumentCountOptions options = null, CancellationToken cancellationToken = default(CancellationToken))
{
throw new NotSupportedException("EstimatedDocumentCountAsync is not supported for filtered collections.");
}