Failed to load API definition (ASP.NET Core/Swagger)

While trying to view your API's with Swagger in ASP.NET Core, you might encounter this error .

Solution:

The problem can be caused by a number of reasons which include the following:

• Swagger configuration errors
• Classes with the same name but in different namespaces
• Public methods without the rest attribute (Get, Post, etc.)

Each one is solved differently and the Swagger Documentation might assist:

However, the easiest way to check original source of the error is to trace the Network messages of the Developer tools of your browser.

• Right-click on the page => Select Inspect
• Select the Network tab
• Select All (all output assessets will be displayed.
• Select the message that shows the error - it will display more tabs
• Select the Messages tab

You should see a detailed message indcating the source of the error.

Good luck!!