Microsoft Coding Guidelines
Brad Abrams posted Microsoft's Internal Coding Guidelines.
This is a good read! I'd agree with most everything there. I see a lot of Microsoft code and it sure is good to have consistancy. One thing I differ with, is that personally, I really like not using braces {} for single command blocks (ex: if (x == 2) return false;). When grouping simular members, instead of just // comments, I use #region directives (ex: #region Property Variables ... #endregion).
Thanks to Jeffrey Palermo for posting about this.