public bool Import(SigClasses.SigImportDescriptor sigImportDescriptor, out string result)

public class SigImportDescriptor
{
    public DataTable DataTable { get; set; }
    public bool BulkMode { get; set; }
    public bool DoNotFindDoubleRecords { get; set; }
    public bool UserIdAsUndoublingKeyIfPrestent { get; set; }
    public string IdDepotIfNotImported { get; set; }
}