What fluent interfaces have you made or seen in C# that were very valuable? What was so great about them?

Question

\"Fluent interfaces\" is a fairly hot topic these days. C# 3.0 has some nice features (particularly extension methods) that help you make them.

FYI, a fluent API means

Answer 1

As @John Sheehan mentioned, Ninject uses this type of API to specify bindings. Here are some example code from their user guide:

Bind().To();
Bind().ToSelf();
Bind().ToSelf().Using();