title: MSBuild command line - add dll reference
body: <p>I use a makefile to compile my C# project.
  In this makefile, I create a library tools.dll calling csc.exe, OK.</p>
  
  <p>Now, I want to use this .dll in my project.
  For some reasons, I have to use MSBuild.exe which use .csproj file.
  In .csproj file I added this section :</p>
  
  <pre><code>&lt;Reference Include="TOOLS"&gt;
    &lt;HintPath&gt;C:\Gen\Lib\TOOLS.dll&lt;/HintPath&gt;
  &lt;/Reference&gt;
  </code></pre>
  
  <p>That's works fine !</p>
  
  <p>But my question is :
  How can I add tools.dll reference from MSBuild command line ?</p>
  
  <p>I need that, to call MSBuild.exe in makefile and give it the path of tools.dll file</p>