title: What is "Platform Toolset" setting in visual studio project
body: <p>I have three doubts. Anyone there for help?</p>
  
  <ol>
  <li>What is the "Platform Toolset" project setting in VS project</li>
  <li>Why such setting required</li>
  <li>What happen, if I change the setting (v110 to v100)</li>
  </ol>