MSDN is running Scott Mitchell's 8-part series on C# Data Structures. He's slowly building the series... so far, very interesting!
- Part 1: An Introduction to Data Structures
- Part 2: The Queue, Stack, and Hashtable
- Part 3: Binary Trees and BSTs *** updated 2/17/2004 ***
- Part 4: Building a Better Binary Search Tree *** updated 2/21/2004 ***
- Part 5: From Trees to Graphs*** updated 3/13/2004 ***
- Part 6: Efficiently Representing Sets*** updated 4/14/2004 ***