Data Mining Resources for C#

I wonder if we could compile a list of resources for Data Mining in C#?

Specifically I am looking for

• Implementatio开发者_Go百科ns of Data Mining Algorithms
• Open Source Data mining libraries
• Tutorials on Data Mining using C#/.net code

& if anyone knows of a C# implementation of http://en.wikipedia.org/wiki/C4.5_algorithm I'd be very interested.

I'll try and summarise the posted results for re-usability

If you are like me, you can have a look at Weka's Souce Code (its in JAVA - I have a dream to port it into C#.Net, if any one has not already started... there is a J# port... http://sourceforge.net/projects/wekadotnet )

Also look at... http://datamining.codeplex.com/