根据要素集名称进行判断

private bool IWorkspaceIsExistDataset(IWorkspace pWorkspace,string strname)        {            IEnumDataset pEnumDataset = pWorkspace.get_Datasets(esriDatasetType.esriDTFeatureDataset);            pEnumDataset.Reset();            IDataset pDataset = pEnumDataset.Next();            bool ExistDataset = false;            #region 判断要素集是否存在            while (pDataset != null)            {                if (pDataset.Name == strname)                {                    ExistDataset = true;                    break;                }                pDataset = pEnumDataset.Next();            }            return ExistDataset;        }