DeveloperExceptionPage (for development) Example: app.UseExceptionHandler("/Home/Error"); or public class GlobalExceptionFilter : IExceptionFilter { public void OnException(ExceptionContext context) { context.Result = new ViewResult { ViewName = "Error" }; } } 🧩 19. How to return partial views?

Partial views are used to render reusable page sections (like headers, sidebars).

Example:

public IActionResult ProductList()

var products = _service.GetAll();

return PartialView("_ProductListPartial", products);

In Razor:

Follow :

@Html.Partial("_ProductListPartial", Model.Products)

🧾 20. Explain Razor Pages vs MVC.

Feature Razor Pages MVC

Structure Page-based (.cshtml +

.cshtml.cs)

Controller + View

Best For Simple or CRUD pages Complex or large web apps

URL /Products/Edit →

/Pages/Products/Edit.cshtml

/Products/Edit →

ProductController.Edit()

Code

Location

In the same file (PageModel) Separate Controller class

Example:

Razor Pages are like simplified MVC without controllers — great for admin dashboards or

forms.

Dependency Injection (DI)