Troubleshoot ASP.NET Core projects

.NET Core SDK warnings

Both the 32-bit and 64-bit versions of the .NET Core SDK are installed

Uninstall the 32-bit .NET Core SDK to prevent this warning. Uninstall from Control Panel > Programs and Features > Uninstall or change a program. If you understand why the warning occurs and its implications, you can ignore the warning.

The .NET Core SDK is installed in multiple locations

You see this message when you have at least one installation of the .NET Core SDK in a directory outside of C:\Program Files\dotnet\sdk\. Usually this happens when the .NET Core SDK has been deployed on a machine using copy/paste instead of the MSI installer.

No .NET Core SDKs were detected

• Install the .NET Core SDK. Obtain the latest installer

• Verify that the PATH environment variable points to the location where the SDK is installed

Obtain data from an app

If an app is capable of responding to requests, you can obtain the following data from the app using middleware:

• Request – Method, scheme, host, pathbase, path, query string, headers

• Connection – Remote IP address, remote port, local IP address, local port, client certificate

• Identity – Name, display name

• Configuration settings

• Environment variables

Place the logging middleware code at the beginning of the Startup.Configure method's request processing pipeline.