title: When to use \\.\c: and when to use c:?
body: <p>If the symbolic link created for device1 is <code>\\??\device</code>(kernel),when accessing it,should be <code>\\.\device</code>(user space),why?</p>
  
  <p>The symbolic for <code>C:</code> should be <code>\\.\c:</code>,why <code>\\.</code> can be omitted?</p>