Validation. C# Coding Standards, Design Guidelines and Tools. Holiday Goodie Bag: Free C# and VB Coding Standards Reference Do. Over the years, I've had the pleasure (and sometimes pain) of being involved in writing and maintaining the internal coding standards documents for nearly every company I've ever worked for.
I still have vivid memories of many bloody internal disputes over some really silly things - where the curly braces should go - whether or not to use underscores in front of member variables. I firmly believe you need them to keep a consistent level of code quality and to this day I will still dig in and fight for this cause. The biggest lesson I've learned: Dotnet Coding Standards.