如何获取ISqlWorkspace实例对象

想通过ISqlWorkspace创建QueryFeatureLayer，但是通过SqlWorkspaceFactoryClass打开工作空间出现错误
代码如下：
            IPropertySet connectionProps = new PropertySetClass();
            connectionProps.SetProperty("server", "IP");
            connectionProps.SetProperty("instance", $"sde:oracle11g:ip/orcl");
            connectionProps.SetProperty("user", "user");
            connectionProps.SetProperty("password", "Password");
            connectionProps.SetProperty("VERSION", "SDE.DEFAULT");
            IWorkspaceFactory workspaceFactory = new SqlWorkspaceFactoryClass();
            IWorkspace workspace = workspaceFactory.Open(connectionProps, 0);
参考 https://blog.csdn.net/weixin_30924239/article/details/95357610 也不行