static void Test()

        {

            IPropertySet sdeProperties = new PropertySetClass();

            sdeProperties.SetProperty("INSTANCE", "sde:oracle10g:T194");

            sdeProperties.SetProperty("DATABASE", "sde");

            sdeProperties.SetProperty("USER", "sde");

            sdeProperties.SetProperty("PASSWORD", "sde");

            sdeProperties.SetProperty("VERSION", "sde.DEFAULT");

            IWorkspace sdeWorkspace = CreateSdeWorkspace(sdeProperties);

        }

        /// <summary>

        /// Retrieves an SDE workspace using the specified property set.

        /// </summary>

        /// <param name="propertySet">The connection parameters.</param>

        /// <returns>An IWorkspace reference to an SDE workspace.</returns>

        public static IWorkspace CreateSdeWorkspace(IPropertySet propertySet)

        {

            // Create the workspace factory and connect to the workspace.

            Type factoryType = Type.GetTypeFromProgID("esriDataSourcesGDB.SdeWorkspaceFactory");

            IWorkspaceFactory workspaceFactory = (IWorkspaceFactory)Activator.CreateInstance(factoryType);

            IWorkspace workspace = workspaceFactory.Open(propertySet, );

            return workspace;

        }