Top 20 NuGet diagnostics Packages

Advanced Async/Await Diagnostics and CodeFixes for C#.
.NET Core client for communicating with the elmah.io REST API
Google Stackdriver Instrumentation Libraries Common Components.
Google Stackdriver Instrumentation Libraries for ASP.NET Core.
Library of .NET functions, extensions and components including asynchronous processing queues, configuration APIs, diagnostics, error handling, console functions, adapter framework, active directory and local account functions, checksum algorithms, unit conversion, binary parsing, cron-style task sc...
Glimpse is a web debugging and diagnostics tool used to gain a better understanding of whats happening inside of your ASP.NET web application.
Glimpse is a web debugging and diagnostics tool used to gain a better understanding of whats happening inside of your ASP.NET MVC 4.0 application.
ASP.NET Core middleware for exception handling, exception display pages, and diagnostics information. Includes developer exception page middleware, exception handler middleware, runtime info middleware, status code page middleware, and welcome page middleware
Defines core interfaces and types that comprise Microsoft.Diagnostics.EventFlow library.
log4net appender for elmah.io
KissLog core package. Contains the minimal components required to use ILogger in your application. Install this package in sub-modules.
PostSharp.Patterns.Diagnostics: support for EnterpriseLibrary.Logging.
ASP.NET Core middleware for analyzing middleware in the request pipeline with System.Diagnostics.DiagnosticSource.
PostSharp.Patterns.Diagnostics: support for Microsoft Application Insights.
PostSharp.Patterns.Diagnostics: support for Common.Logging.
PostSharp.Patterns.Diagnostics: Support for PostSharp "Frigate".
Exposes cross-platform Performance Counters that are valid for use from .NET Standard assemblies over all supported platforms.
KissLog AspNet WebApi package. Contains the components required to hook Asp.Net WebApi applications with KissLog. Install this package to Asp.Net WebApi applications.
KissLog AspNet Mvc package. Contains the components required to hook Asp.Net Mvc applications with KissLog. Install this package to Asp.Net MVC applications.
ASP.NET Core middleware for Entity Framework Core error pages. Use this middleware to detect and diagnose errors with Entity Framework Core migrations.