Microsoft.AspNetCore.Diagnostics Namespace

Contains types related to capturing and reporting diagnostics in ASP.NET Core. Middleware such as ExceptionHandlerMiddleware, DeveloperExceptionPageMiddleware, and StatusCodePagesMiddleware are used to handle errors in ASP.NET Core.

Classes

CompilationFailure	Describes a failure compiling a specific file.
DeveloperExceptionPageMiddleware	Captures synchronous and asynchronous exceptions from the pipeline and generates error responses.
DiagnosticMessage	A single diagnostic message.
ErrorContext	Provides context about the error currently being handled by the DeveloperExceptionPageMiddleware.
ExceptionHandlerFeature	A feature containing the path and error of the original request for examination by an exception handler.
ExceptionHandlerMiddleware	A middleware for handling exceptions in the application.
StatusCodeContext	Contains information used by the handler of the StatusCodePagesMiddleware.
StatusCodePagesFeature	Represents the Status code pages feature.
StatusCodePagesMiddleware	A middleware for generating the response body of error status codes with no body.
StatusCodeReExecuteFeature	Default implementation for IStatusCodeReExecuteFeature.
WelcomePageMiddleware	This middleware provides a default web page for new applications.

Interfaces

ICompilationException	Specifies the contract for an exception representing compilation failure.
IDeveloperPageExceptionFilter	Provides an extensibility point for changing the behavior of the DeveloperExceptionPageMiddleware.
IExceptionHandler	Represents an interface for handling exceptions in ASP.NET Core applications. IExceptionHandler implementations are used by the exception handler middleware.
IExceptionHandlerFeature	Represents a feature containing the error of the original request to be examined by an exception handler.
IExceptionHandlerPathFeature	Represents an exception handler with the original path of the request.
IStatusCodePagesFeature	Represents the Status code pages feature.
IStatusCodeReExecuteFeature	Represents a feature containing the path details of the original request. This feature is provided by the StatusCodePagesMiddleware when it re-execute the request pipeline with an alternative path to generate the response body.

Remarks

For more information about diagnostics, see Handle errors in ASP.NET Core.