Why Microsoft Should Introduce Compiler Extensibility But May Not

Tore Vestues discusses the possible benefits of introducing compiler extensibility that would allow developers to get into the .Net code compliation process and modify code before generating the .Net assembly. He also cautions us not to get too excited because it seems that Anders Hejlsberg (C# creator) mentioned in a PDC 2008 session that compiler extensibility will never ever be available in C#.