当我尝试运行时，出现以下错误：
system.data.sqlclient.sqlexception:'列'column'的定义必须包含数据类型
但是我在“business”类中定义了变量的类型

public void import (String TXT_T_NEG, String TXT_ACAO, String TXT_ESPEC_PAPL, String Txt_num_neg, String Id_usr)
{
        lista.Add (new business(TXT_T_NEG, TXT_ACAO, TXT_ESPEC_PAPL, Txt_num_neg, Id_usr)
}

public void bulkupdate ()
{
        var bulk = new BulkOperations ();

        using (TransactionScope trans = new TransactionScope ())
        {
            using (SqlConnection cone = new SqlConnection (@"Myconnection"))   
            {
                bulk.Setup <business> ()
                .ForCollection (lista)
                .WithTable ("table")
                .AddColumn (x => x.Txt_t_neg)
                .AddColumn (x => x.Txt_acao)
                .AddColumn (x => x.Txt_espec_papl)
                .BulkUpdate ()
                .MatchTargetOn (x => x.Txt_num_neg)
                .MatchTargetOn (x => x.Id_usr)
                .Commit (cone);
            }
            trans.Complete ();
        }
}