No persister for: System.Collections.Generic.List'1[LEAD.ERP.Objects.Domain.Mate......]

报的错

No persister for: System.Collections.Generic.List'1[LEAD.ERP.Objects.Domain.Material,LEAD.ERP.Objects,Version = 1.0.0.0,Culture = neutral,PublickeyToken = null]]
没有持久性

原因

报错或者删除List类型时，要一条条item操作
例如：
var curSession = DBHelper.CurrentSession;
foreach(var item in lst)
{
     curSession .Delete(item );
}