When you launch a web project in Visual Studio, by default is uses the 32-bit version of IIS Express. To change that you can enable the 64-bit version through Options.

So, head to:

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  • Tools
  • Options
  • Project and Solutions
  • Web Projects and check the option
  • “Use the 64 bit version of IIS Express for web sites and projects”
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iis-express-x64

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