The Startup class is initialized and executed right after the web application starts. It is located under the project root folder in the Startup.cs file. This is where the application services and request pipeline components can be configured.

The Startup class contains two methods:

• ConfigureServices: This is where services will be added to the project. For example, this is where logging or authentication services are added.
• Configure: This is where services and request pipeline components are configured. For example, the settings for the authentication and logging services will be set here.