title: dependency could not be resolved
body: <p>I am trying to build a web site using .net framework core with entity framework core.  I created a web project using the ASP.NET Core Web Application (.net core) template with Visual Studio 2015 Professional (update 3).  Then I used Nuget to add the Microsoft.EntityFrameworkCore.Tools to the solution.  </p>
  
  <p>When I compiled the solution, I got this dependency error - "NU1001 The dependency Microsoft.EntityFrameworkCore.Tools >= 1.0.0-preview2-final could not be resolved".  I googled the topic but couldn't find the solution.  How can I fix this??</p>