I'm running GacUtil.exe from within Visual Studio Command Prompt 2010 to register a dll (CatalogPromotion.dll) to the GAC. After running the utility, it says Assembly Successfully added to the cache, and running gacutil /l CatalogPromotionDll shows that the GAC contains the assembly, but I can't see the assembly when I navigate to C:\WINDOWS\assembly from Windows Explorer. Why can't I see the assembly in WINDOWS\assembly from Windows Explorer but I can see it using gacutil.exe?

Background: Here's what I typed into the command prompt for VS Tools:

    C:\_Dev Projects\VS Projects\bmccormack\CatalogPromotion\CatalogPromotionDll\bin
    \Debug>gacutil /i CatalogPromotionDll.dll
    Microsoft (R) .NET Global Assembly Cache Utility.  Version 4.0.30319.1
    Copyright (c) Microsoft Corporation.  All rights reserved.

    Assembly successfully added to the cache

    C:\_Dev Projects\VS Projects\bmccormack\CatalogPromotion\CatalogPromotionDll\bin
    \Debug>gacutil /l CatalogPromotionDll
    Microsoft (R) .NET Global Assembly Cache Utility.  Version 4.0.30319.1
    Copyright (c) Microsoft Corporation.  All rights reserved.

    The Global Assembly Cache contains the following assemblies:
      CatalogPromotionDll, Version=1.0.0.0, Culture=neutral, PublicKeyToken=9188a175
    f199de4a, processorArchitecture=MSIL

    Number of items = 1

However, the assembly doesn't show up in C:\WINDOWS\assembly.