title: How to manage menuStrip in Mdiparent from child form?
body: <p>I have 2 forms : Login (child) and Form1 (as MdiParent).<br>
  The login form has 3 roles and each role has different access control to the menuStrip </p>
  
  <p><strong>Example:</strong> menuStrip in form1:</p>
  
  <pre><code>-file (login, logout)
  master (register, view)
  </code></pre>
  
  <p>role : admin, trainer, trainee.<br>
  after login, menu which can be accessed for admin is file (login, logout) and master(view) only.</p>
  
  <p>So my question is how to disable/hide the menu register for admin in login form? </p>