'ILoggerFactory' does not contain a definition for 'AddConsole'

Question

private ILoggerFactory ConfigureLogging(ILoggerFactory factory) {       factory.AddConsole();       return factory; } 

I have found the piece of code above on Github. It gives the following error:

'ILoggerFactory' does not contain a definition for 'AddConsole' and the best extension method overload 'ConsoleLoggerExtensions.AddConsole(ILoggingBuilder)' requires a receiver of type 'ILoggingBuilder'

I'm using NET Core 3.0 and I have the following NuGet packages installed.

<PackageReference Include="Discord.Net" Version="2.1.1" /> <PackageReference Include="Discord.Net.Commands" Version="2.1.1" /> <PackageReference Include="Discord.Net.WebSocket" Version="2.1.1" /> <PackageReference Include="Microsoft.Extensions.Configuration" Version="3.0.0" /> <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="3.0.0" /> <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="3.0.0" /> <PackageReference Include="Microsoft.Extensions.Logging" Version="3.0.0" /> <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="3.0.0" /> <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="3.0.0" /> <PackageReference Include="Microsoft.Extensions.Options.ConfigurationExtensions" Version="3.0.0" /> 

Why do I get that ILoggerFactory does not have the method AddConsole()? How can I fix this?

Answer 1

I just ran into this following a course on Pluralsight. I got ahead of myself before the next slide explaining why their .AddConsole was working in the ILoggerFactory.Create.

Even though you only need using Microsoft.Extensions.Logging in your class, you need to explicitly add a package reference to your .Net Core app in order for the .AddConsole method to be found.

dotnet add package Microsoft.Extensions.Logging.Console 

and add this using statement to your code

using Microsoft.Extensions.Logging; 

Answer 2

There is a seperate issue at play, previously the signature for AddConsole() expected an ILoggerFactory, that has since changed to an ILoggerBuilder, as hinted at in the error message.

The following it seems is the new way to stand up a new Console logger:

var loggerFactory = LoggerFactory.Create(builder => builder.AddConsole());