Method not found: 'Serilog.LoggerConfiguration

Question

I have a main logger for my solution which is defined as

    Log.Logger = new LoggerConfiguration()
        .MinimumLevel.Verbose()
        .WriteTo.LiterateConsole(LogEventLevel.Verbose)
        .WriteTo.RollingFile($"{appLogDir}{Path.DirectorySeparatorChar}logs{Path.DirectorySeparatorChar}V-RPi-{{Date}}.log")
        .WriteTo.RollingFile($"{appLogDir}{Path.DirectorySeparatorChar}logs-warnings{Path.DirectorySeparatorChar}V-RPi-{{Date}}.log", LogEventLevel.Warning)
        .WriteTo.File($"{appLogDir}{Path.DirectorySeparatorChar}recent-log.log", fileSizeLimitBytes: 134217728, restrictedToMinimumLevel: LogEventLevel.Verbose)
        .CreateLogger();

I want to create two separate loggers to log things in two class instances. I have defined them as below. This is located in a separate assembly from the main project.

private ILogger comRespLog;
public **constructor**(string name)
{
comRespLog = new LoggerConfiguration()
                .MinimumLevel.Verbose()            
                .WriteTo.RollingFile($"{appLogDir}{Path.DirectorySeparatorChar}logs-CommandResponse-{Name}{Path.DirectorySeparatorChar}V-RPi-{{Date}}.log")
                .CreateLogger();
}

I receive no build errors but I receive this at run time.

Method not found: 'Serilog.LoggerConfiguration Serilog.RollingFileLoggerConfigurationExtensions.RollingFile(Serilog.Configuration.LoggerSinkConfiguration, System.String, Serilog.Events.LogEventLevel, System.String, System.IFormatProvider, System.Nullable1<Int64>, System.Nullable1, Serilog.Core.LoggingLevelSwitch, Boolean, Boolean, System.Nullable`1)'."}

Hollah

Answer 1

Turns out I was referencing an older nuget package in my Main Assembly than I was in the sub assembly. After updating them so they match the problem went away.

Hollah

Hi @theColonel26 I am facing a similar issue, #58086637 . Could you please help me in fixing it. – Firework

For reference, my fix was just to upgrade all Serilog references in nuget to latest version and error went away. So that was a relatively quick way to fix :) – Bertelli

Answer 2

Issue due to version mismatch

Your code is correct just match version

I was using Version 2.0 instead of 1.5

Please match your version with (if you are using Active Directory / Azure Active Directory)

Steps

1. UnInstall Serilog

2. Install Serilog with match version (1.5/ 2.0/..)

Spiegleman

Answer 3

Should install the serilog for the netcore framework.

dotnet add package Serilog.AspNetCore --version 4.1.0

Tingle

Answer 4

For me, the workaround was removing references from web.config, as the versions were fixed and still i was facing issues, so I removed the assembly references from the web.config, and thanks to .net compiler, it targets, as I can think, if a reference is there, to the target interface and hence cannot find things exactly implemented, remove references from web.config of the dll, and the IIS will automatically pick up references from the class file.

Zakarias

Answer 5

In my case, I had the QBO SDK, with Serilog libraries in tow, installed in 2 projects within my solution. Project _Presention only needed the QBO SDK to support QBO data types for use in presenting data in grids and I was not using the Serilog libraries for anything else in _Presentation.

Project Services was the project that was actually communicating with QBO Online via the API, thus needing the Serilog libraries.

I removed the Serilog references in the app.config file for Project _Presentation. At which point, the error no longer was present and I was able to communicate with QBL Online.

Frilling