title: 'Npgsql' already has a dependency defined for 'System.Threading.Tasks.Extensions'
body: <p>Please help how to solve this?  </p>
  
  <blockquote>
    <p>'Npgsql' already has a dependency defined for
    'System.Threading.Tasks.Extensions':</p>
  </blockquote>
  
  <p><img src="https://i.stack.imgur.com/HrO1O.jpg" alt="&#39;Npgsql&#39; already has a dependency defined for &#39;System.Threading.Tasks.Extensions&#39;"></p>
  
  <p>I've already installed package System.Threading.Tasks.Extensions -Version 4.4.0 
  Install-Package System.Threading.Tasks.Extensions -Version 4.4.0 </p>
  
  <p>even after that I am unable to overcome this issue.</p>