Can't get IIS Express 8 beta to run website as 64-bit process

Solution 1:

This option is now part of Vs 2013 / 2015 / 2017:

Tools | Options | Projects and Solutions | Web Projects | Use the 64 bit version of IIS Express

Solution 2:

From a Microsoft response to forum post on http://visualstudio.uservoice.com -

This is working for me even though it is not endorsed or supported officially by Microsoft.

Mike Harder (Microsoft) commented · January 31, 2013 5:26 p.m.

You can configure Visual Studio 2012 to use IIS Express 64-bit by setting the following registry key:

reg add HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\11.0\WebProjects /v Use64BitIISExpress /t REG_DWORD /d 1

However, this feature is not supported and has not been fully tested by Microsoft. Improved support for IIS Express 64-bit is under consideration for the next release of Visual Studio.

Allow for IIS Express 64 bit to run from Visual Studio 2012