Where is the .net 3.0 version of PresentationCore.dll?

Hi all;

I'm able to reference and use PresentationCore.dll (for GlyphTypeface) but the only PresentationCore.dll installed on my system is the .NET 4.0 one. WHere is the .NET 3.0/3.5 one? I need the location because I use IKVM.

thanks - dave

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