ASP.NET 5 MVC: unable to connect to web server 'IIS Express'

Solution 1:

After installing Update 2 for Visual Studio 2015 I started getting the same error. I tried everything above with no luck. However, I found a solution that works for me:

1. Delete YourSolutionFolder\\.vs\config\applicationhost.config file (note: .vs is a hidden folder)
2. Open Visual Studio, right-click on web site > Properties > Debug tab > Web Server Settings > App URL - change port number.

If you have IIS configured to use the same port, (stop the application / use different port) and try again.

Solution 2:

Exit VS and delete the (project)\.vs\applicationhost.config file. Restart VS. It should start working.

Solution 3:

Try using a different port. I just set up a new Core 1.0 RC1 project and got the same error.

• Right click web project
• Debug tab
• Toggle Enable SSL off and on again, it should generate a new random port
• Copy the SSL URL and paste into Launch URL box
• Run the project

Worked for me (TM).

Answer from: https://stackoverflow.com/a/28650554/134761