i don't recognise the concept of a nullable type. can you post a short code snippet to show me what you are doing? which IDE are you using? is this something new in C# 2?
when you say they are coloured red, if you mean that VA is underlining them with a red line to indicate a mistyped symbol then i am getting the same thing.
case=867
i have dabbled with C# in VS 2003 but have yet to look at C# in VS 2005. i will one of these days, i am sure