ASP.NET Core 1.1 web application does not start when running with IIS Express in Visual Studio 2017

Question

I've recently installed Visual Studio 2017 Professional and have just created the boilerplate ASP.NET Core Web Application

This is what happens when I hit Run (With IIS Express):

And this is what Visual Studio 2017's Output window says:

The program '[8260] dotnet.exe' has exited with code -2147450749 (0x80008083).

The program '[6476] iisexpress.exe' has exited with code 0 (0x0).

Steps to fix?

Probably a duplicate of stackoverflow.com/questions/42121332/… ? — Chris F Carroll
– Chris F Carroll, Commented Mar 27, 2017 at 12:21

Community · Accepted Answer · 2017-05-23 11:55:07Z

2

I think it's a bug as per Visual Studio 2017 Doesn't Run Core Apps with IIS Express.

And that the current status is fixed pending release: https://developercommunity.visualstudio.com/content/problem/11391/aspnet-core-iis-express-httplocalhost51733-failed.html

And that the workarounds meanwhile are probably:

dotnet run
Publish to local IIS. Which is working for me.
(Untested: downgrade from core-1.1 to core-1.0)

If you aren't familiar with VS2017/asp.net: You probably have the Debug toolbar visible which shows you a dropdown with a green arrow and 'IIS Express'. Click on that and you should see a 'Run {yourprojectname}' option. This is the equivalent of dotnet run {yourprojectname} from the commandline

edited May 23, 2017 at 11:55

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answered Mar 27, 2017 at 12:21

Chris F Carroll

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3 Comments

Matthew Layton Over a year ago

I tried running the project itself, rather than via IIS Express, but I still get the dotnet error.

Chris F Carroll Over a year ago

If you cd to the project directory and do dotnet run do you see any more helpful error?

Chris F Carroll Over a year ago

Or, having chosen 'Run {yourprojectname}' in the debugger toolbar, does it launch in debug? If so, it should break on exceptions and tell you waht the problem is

Matthew Layton · Accepted Answer · 2017-04-03 10:42:53Z

1

Okay, this worked for me: Install the x86 SDK...

https://www.microsoft.com/net/download/core

answered Apr 3, 2017 at 10:42

Matthew Layton

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1 Comment

user9934620 Over a year ago

Installing x86 sdk made no difference to issue on hand in my case.

A-J-Bauer · Accepted Answer · 2017-04-28 14:09:40Z

1

'The program '[8260] dotnet.exe' has exited with code -2147450749 (0x80008083).'

Could be a x86 x64 related thing. (Same for Console Core Apps)

If you have installed multiple versions of .NET Core like so:

You need to set the order in the path environment variable:

So that the one you want to use appears first and then (re-)start Visual Studio. To check which dotnet is currently "active" run: dotnet --info in the console.

answered Apr 28, 2017 at 14:09

A-J-Bauer

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1 Comment

Tim B James Over a year ago

This solved my issue. I removed the (x86) version from my Path, restarted Visual Studio (to be sure) and then tried again. This time it ran the project fine.

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