title: Use TreeView Class in a Class Library
body: <p>Is it possible to use the TreeView Class in a class library.</p>
  
  <p>I want to make a method where I pass a Treeview from windows form , I tried to import System.Windows.Forms but it is not found and I cannot find any nuget package to install.</p>
  
  <p>I want to do something like this:</p>
  
  <pre><code>public void MyMethod(TreeView tree){tree.Nodes.Add("Something");}
  </code></pre>
  
  <p>Thanks.</p>