Update: this seems to work best in RSS, so I'll go with it for now. Copy as HTML from VisualStudio 2005, then Paste Special with the Keep Formatting option in Live Writer.
This is another method of inserting code... I'm mostly just testing, so bear with me. This is using the "Copy as HTML..." from inside VS.NET, then using the new Paste Special... in Live Writer.
[DataContract]
public class BankUser : UserBase
{
public BankUser() : base() { }
[DataMember]
public int TupperwarePoints;
}