I've been asked by my pointy haired boss to educate our new co-ops (interns) in the ways of C#. I have roughly ~30mins to cover the topics of Delegates, Events and Lambda Expressions. The time restriction is rather tight and the topics are broad. Since I'm not a C# guru, I would like some hints and pointers.

1. Since my time is short, what points should I cover with respect to the three topics listed above?
2. What are some good Do's and Dont's when using those three things?
3. I might have time for a short Lambda Expr demo. What is the most common use of LExpr (probably a Select().Where() statement on an enumerable??) that I could demo?

Thanks.

EDIT: The students have working knowledge of C++ and Java.