For reusability, developers can create Razor Components, which are similar to partial views but with more logic encapsulation. Razor Components encapsulate both the UI and the code, making them highly reusable and self-contained.

To make a tag helper available across all your Razor views without adding its namespace to each view individually, you can use the element in the _ViewImports.cshtml file. This centralizes tag helper configuration for the entire directory, making it accessible to all views within that directory.

The "Startup.cs" file in an ASP.NET Core project plays a crucial role in configuring middleware and services for the application. It defines how the application will handle requests, set up routing, and configure various components like authentication, logging, and dependency injection. It's essentially the entry point for configuring the application's behavior.

ASP.NET Core introduces a built-in Dependency Injection (DI) system, which was not part of traditional ASP.NET. In the past, developers often relied on third-party libraries for DI, but ASP.NET Core brings this critical feature into the framework, making it easier to manage dependencies in your applications.

The dotnet CLI (Command-Line Interface) allows you to install NuGet packages from a local feed or folder. It provides the dotnet add package command, which supports specifying package sources. This is particularly useful when working in an offline environment or when you want to use custom package sources.

To get started with ASP.NET Core development, the primary software you need to install is the .NET SDK (Software Development Kit). This kit includes the necessary tools, libraries, and runtime environments to build, test, and run ASP.NET Core applications. Visual Studio Code is a popular code editor but does not include all the components required for ASP.NET Core development.

The [Authorize] attribute should be applied above the method that requires authorization. This means you place it directly above the action method within a controller where you want to restrict access. This approach allows for fine-grained control over which actions are protected and who can access them, ensuring security at the method level.

The recommended approach for API versioning in ASP.NET Core is to embed the API version in the route URL. This approach is commonly referred to as "URI versioning" and provides clear versioning information within the request URL, making it easy for developers and clients to understand and use different API versions.

In Entity Framework Core, developers can use the ExecuteSqlCommand method inside the DbContext to execute arbitrary SQL commands. This is especially useful for advanced configurations, data migrations, or when you need to perform database operations that are not supported by LINQ.

After adding the new field to the model class, you should run the dotnet ef migrations add command to generate a new migration. This migration will contain the necessary changes to update the database schema. Manually updating the schema is not recommended as it can lead to inconsistencies.