ArcSDE：C#创建SDE要素数据集

    /// <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);  
        }  
    }