MeuLogProvider.cs

using Microsoft.Extensions.Logging;
using System;
using System.IO;

namespace EFCore_NM
{
  class MeuLogProvider : ILoggerProvider
  {
    public ILogger CreateLogger(string categoryName)
    {
      return new MeuLog();
    }

    public void Dispose()
    {
      throw new NotImplementedException();
    }
  }

  internal class MeuLog : ILogger
  {
    public IDisposable BeginScope<TState>(TState state)
    {
      return null;
    }

    public bool IsEnabled(LogLevel logLevel)
    {
      return true;
    }

    public void Log<TState>(LogLevel logLevel, EventId eventId, TState state, Exception exception, Func<TState, Exception, string> formatter)
    {
      File.AppendAllText(@"D:\VisualStudio2019\logs\sql.txt", formatter(state, exception));
      Console.WriteLine(formatter(state, exception));
    }
  }
}