KissLog.NET

Centralized Logging, Diagnostics and Exceptions Handling
Lightweight and Easy to install
KissLog SDK only depends on Newtonsoft.Json.
It is easy to integrate on Legacy applications, whithout breaking existing functionality.
Error Reporting
Automatically captures and logs all the application errors.
Logging functionality
Write log messages to follow workflows, track parameters and debug execution details.
Save Files
You can log files just like normal data. They will be available when viewing the captured logs.
Metrics and Website Analytics
KissLog captures all the traffic, generating metrics and statistics about the application usage and behavior.
Slack Integration
Get Slack notifications when specific events are captured by the application.

You can use KissLog SDK without an account on KissLog.net

Using Cloud or On-premises solution gives you the advantage of Centralized Logging and Website Analytics.