title: Microsoft.Extensions.Logging Vs. NLog
body: <p>I see a lot of posts mentioning usage of Microsoft.Extensions.Logging together with NLog. </p>
  
  <p>I'd like to better understand what Microsoft.Extensions.Logging is used for? </p>
  
  <p>And specifically why is it needed or what's the benefit of using it together with NLog?</p>