csharp-developer

Define endpoints using route groups with MapGroup, then map GET, POST, PUT, and DELETE handlers that return typed Results. Add endpoint filters for validation, register services with dependency injection, and configure JWT bearer authentication in Program.cs.

Use AsNoTracking for read-only queries, project into DTOs with Select instead of loading full entities, and apply AsSplitQuery to avoid cartesian explosion on includes. For repeated queries, use EF.CompileAsyncQuery, and use ExecuteUpdateAsync or ExecuteDeleteAsync for bulk operations.

Yes, Blazor supports JS interop through IJSRuntime by importing ES modules with InvokeAsync and calling exported functions. Initialize modules in OnAfterRenderAsync on first render and dispose IJSObjectReference instances via IAsyncDisposable to avoid leaks.

Use ValueTask when a method frequently completes synchronously, such as cache hits, to avoid Task allocation. Use Task for methods that are almost always asynchronous, and always accept a CancellationToken for cancellable operations.

Never expose EF Core entities directly in API responses because they leak database schema details, risk over-posting attacks, and can cause serialization cycles with navigation properties. Map entities to DTOs using Select projections instead.