To set up a route for a product details page with a product ID parameter using attribute routing, you should use [Route("products/details/{id:int}")]. The ':int' constraint specifies that the 'id' parameter must be an integer.

HTTPS (Hypertext Transfer Protocol Secure) is the recommended method for highly secure data transmission in Web APIs. It adds a layer of encryption (SSL/TLS) to the HTTP protocol, ensuring that data transmitted between the client and server is encrypted and secure from eavesdropping or tampering.

Entity Framework Core (EF Core) is primarily an Object-Relational Mapping (ORM) framework. It simplifies database operations by allowing developers to work with databases using object-oriented code, making it easier to interact with and manipulate data. User authentication, web hosting, and front-end development are unrelated to EF Core's core functionality.

To send binary content as the response in ASP.NET Core, you should use the FileResult action result. This result type allows you to send files, such as images, PDFs, or any binary data, in response to a client request. You can specify the file's content type, name, and other details.

In attribute routing, the order of route definitions is significant because it determines the priority of routes. Routes are evaluated in the order they are defined, and the first matching route is used. This allows you to control which route handles a particular request when there are multiple possible matches.

ASP.NET Core Identity provides the "Password Requirements" feature to specify criteria for user passwords, including the minimum length. This is essential for enforcing security standards, and developers can configure it as needed in their applications.

Azure App Service is a Platform-as-a-Service (PaaS) offering that allows developers to build, deploy, and scale web apps and APIs easily. It provides a fully managed environment for hosting ASP.NET Core applications in the Azure cloud.

To prevent a Razor form from being submitted if client-side validation fails, you can use the onsubmit attribute on the form element. By specifying a JavaScript function that returns false when validation fails, you can stop the form submission and show validation errors to the user.

The [Authorize] attribute in ASP.NET Core is primarily used for Authorization, not Authentication. It restricts access to a particular action method or controller to only authenticated users who meet specific authorization requirements. This helps in controlling who can access different parts of your application based on roles or policies.

When defining a one-to-many relationship in Entity Framework Core, the HasMany method is commonly used to represent the "many" side of the relationship. This method allows you to specify the navigation property on the "one" side and configure various aspects of the relationship, such as cascading deletes and foreign key constraints on the "many" side. It's an essential part of modeling complex database relationships.