This Support Video clip explains about how to convert 2 Dynamic Link Linear Features into Point List Linear Features so that we can join it. I have also explained how to create a new Graphic Linear Feature from a MicroStation element.
Click the video below to play it. To view in fullscreen mode, first click the YouTube link at the bottom of the video to launch the video on the YouTube site. Then, click the fullscreen button (rightmost button at bottom of video).