Eric describes a new Whidbey feature focused on creating those ‘utility’ classes in the style of System.Math or System.Environment:
C# Whidbey Featurette #3: Static classes
Because all functions in C# must live inside of a class, there are some clases – System.Math is a canonical example – that are merely collections of static methods. Since it’s useless to create an instance of such a class, in current versions of C#, you can protect against this by creating a private constructor. The constructor can never be called, and therefore no instance can be created.
There are three issues with this approach:
Of course, you’ll have to click on the title of his post to read more 🙂