C# GOF Pattern Examples

Are there any C# GOF design pattern examples? I Keep finding this site which does开发者_如何学Python have examples, but the "C# Optimised" examples are only available when you purchase one of their products.

There is a book called "Design Patterns in C#" by Steven John Metsker that gives examples in C# for the 23 classic GoF patterns.

Edit: On the "freely available online" side, there is a decent series on Code Project by this author.

I really recommend Head-First Design Patterns.

It is technically Java, but I've never looked at Java before and was completely readable for a C# developer. I checked it out from the library, only to find out that many of the .NET developers I know own it themselves already.