12/19

http://msdn.microsoft.com/msdnmag/issues/06/01/CLRInsideOut/default.aspx

The good news is that part of this problem is solved in the .NET Framework 2.0—regular expressions are compiled using Lightweight Code Generation, which allows the generated MSIL to be garbage collected.

コンパイルした正規表現がアンロード出来ない問題が.NET2.0では部分的に解決したようです。