批量添加数据

C#批量向数据库增加数据：
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using (var dbPlatform = DbContext.PlatformWorkCreate())
                {
                    var CId = dbPlatform.Query<LQ_WaWaShowCategory>().Where(t => t.CategoryNameEn == "dianzijiaocai").Select(t => t.Id).FirstOrDefault();
                    for (int i = 0; i < model.SelectedIds.Count; i++)
                    {
                        LQ_PublicResourceOutline dmodel = null;
                        dmodel=new LQ_PublicResourceOutline();
                        dmodel.LQ_OutlineId = model.SelectedIds[i];
                        dmodel.CategoryId = CId;
                        dmodel.PublishStatus = 0;
                        dmodel.Summary = "";
                        
                        dbPlatform.Add(dmodel);
                    }
                    dbPlatform.SaveChanges();
                    
                }