/// <summary>      /// 判断指定数据集是否存在      /// </summary>      /// <param name="workspace">工作空间名称</param>      /// <param name="strDataSetName">数据集名称</param>      /// <returns>存在，true；否则，false</returns>      public static bool isDatasetExist(IWorkspace workspace, string strDataSetName)      {          if (workspace == null)          {              return false;          }          else if (workspace.get_NameExists(esriDatasetType.esriDTFeatureDataset, strDataSetName))          {              return true;          }          else          {              return false;          }      }  

    /// <summary>      /// 创建要素数据集      /// </summary>      /// <param name="workspace">工作空间名称</param>      /// <param name="strDatasetName">数据集名称</param>      /// <param name="spatialReference">参考系</param>      public static void CreateFeatureDataset(IWorkspace workspace,string strDatasetName, ISpatialReference spatialReference)      {          IFeatureWorkspace featureWorkspace = workspace as IFeatureWorkspace;          if (featureWorkspace == null)              return;          if (!isDatasetExist(strDatasetName))          {              featureWorkspace.CreateFeatureDataset(strDatasetName, spatialReference);          }      }