Unable to launch IIS Express in Visual Studio 2017 RC

Question

Had a web application working in Visual Studio 2015 Update 3 perfectly. I ported the project to Visual Studio 2017 RC and compiled successfully. When debugging the applicati

Answer 1

You are most probably missing "commandName": "Project" in your launchSettings.json file. I have described the issues I faced with porting to VS 2017 here

Answer 2

In my case with Visual Studio 2017 Community Edition I tried following:

• Delete IISExpress config folder in Documents
• Delete hidden .vs in project root
• Restart Visual Studio 2017 and computer

nothing worked until I re-run Visualt Studio Installer and choose option "Repair". Then somehow everything started working.