title: Need to use Variable groups as Input parameters in Azure pipeline
body: <p>I am very new to Azure pipeline and I am stuck in an issue from pas one week.
  I have a Selenium c# test case which I have to execute on pipeline.
  I must use the Variable groups as the input parameters for my test cases.
  So, I have created appsettings.json file
  <a href="https://i.stack.imgur.com/ibdxt.png" rel="nofollow noreferrer">appsettings.json</a></p>
  <p>In my YAML code, I am able to read the variable groups, but I am not able to use it's values in the pipeline.How to do it?</p>