title: How to use yarn in ASP.Net core MVC to install bootstrap in wwwroot folder
body: <p>recently I started learning ASP.Net core MVC.  I always used bower to install packages for my projects in Visual Studio 2017. but now I want to use yarn. since it seems bower is deprecated. but I don't know how to use yarn to install bootstarp in wwwroot folder. for bower i used bower.json and it would install bootstarp automatically. I use "yarn add bootstrap@4.0.0-alpha.6 --dev" but it install it in node_modules in the project folder and I can't see it in the solution explorer,
  thanks</p>