they are called attributes, attribute programming is one of the innovations in .NET, seeC# Attributes
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/csref/html/vclrfcsharpattributes.aspChapter 18: Attributes and Reflection
http://www.oreillynet.com/pub/a/dotnet/excerpt/prog_csharp_ch18/
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/csref/html/vclrfcsharpattributes.aspChapter 18: Attributes and Reflection
http://www.oreillynet.com/pub/a/dotnet/excerpt/prog_csharp_ch18/
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