On Wednesday, 7 November 2012 at 13:43:39 UTC, Kagamin wrote: > http://msdn.microsoft.com/en-us/library/system.threadstaticattribute.aspx > http://msdn.microsoft.com/en-us/library/System.Diagnostics.ConditionalAttribute.aspx Oh, and C# has ObsoleteAttribute http://msdn.microsoft.com/en-us/library/System.ObsoleteAttribute.aspx