Get Visual Studio to use the 64-bit version of IIS Express

By default, when you use Visual Studio, the version of IIS Express that Visual Studio uses will always be the 32-bit version.

Fortunately, though, you can get Visual Studio to use the 64-bit version of IIS Express instead!!

To do so, you have to go into Tools-->Options-->Projects and Solutions-->Web Projects

Then, you simply check the checkbox for "Use the 64-bit version of IIS Express for web sites and projects"