what is difference between Serilog.Sinks.File and Serilog.Extensions.Logging.File?

Question

what is difference between Serilog.Sinks.File and Serilog.Extensions.Logging.File packages in asp.net core?

When I tried to implement logging in asp.net core project with Serilog I found a quick example here which used Serilog.Sinks.File.

When I tried to implement the same in my project,the logger factory didnt have the extension AddFile().

But when I added another extension Serilog.Extensions.Logging.File I got the extension.

Are both extensions needed? or just Logging.File extension is enough?

What is the basic difference Sinks.File and Logging.File ?

Answer 1

In the link you provided, the example explicitly use Serilog.Extensions.Logging.File.

It is this extension that provide the AddFile method to ILoggerFactory (via Extension Methods mecanisms in DotNet) :

Extension of Microsoft.Extensions.Logging.IloggerFactory

A quick look at the Nuget package definition of Serilog.Extensions.Logging.File indicates that it has a dependency on Serilog.Sinks.RollingFile. The latter extension itself has a dependency on Serilog.Sinks.File.

So, Serilog.Extensions.Logging.File extends ILoggerFactory, providing the AddFile() method. That method uses the RollingFile class (as seen in the source code).