Let’s say you have an array of ObjectIDs. And you want to filter out and keep all the lines. How would you do that?

When you are testing something you’ll want the code to run in a particular way, but when you are dealing with the real thing – in “production” mode – then you might not want to have the test code there as well. How can you manage this in c#?

Normally you’d go straight for the .Contents property…and I did just that but I also got some formatting marks. So how’d you get it without them?

You want certain objects to be selected at the end of a command. How do you do this?

A curious feature to be aware about Ruby.

Now you want to access the modelspace ObjectId.