UseExceptionHandler, IExceptionHandler (.NET 8), ProblemDetails, middleware vs filters, logging errors

Unhandled exceptions are inevitable.

The question is not whether they will happen — it's whether your API returns a clear, structured error response or exposes a raw stack trace to the client.

Why You Need Global Exception Handling

Without it:

Unhandled exceptions return 500 Internal Server Error with no useful body

Stack traces may be leaked to clients in non-production environments

Logging is inconsistent — some exceptions get logged, others disappear

Every controller has its own try-catch — duplicated and inconsistent

With it:

Every unhandled exception is caught in one place

Errors are logged consistently

Clients receive a structured, predictable error response

Controllers stay clean — no try-catch everywhere

Approach 1: UseExceptionHandler Middleware

The simplest and most compatible approach. Works in all ASP.NET Core versions.

app . UseExceptionHandler ( errorApp => { errorApp .…