title: Get X509 Certificate from mage signed manifest file
body: <p>I have an <code>OutlookAddin.vsto</code> file (yes, its an Outlook addin VSTO file) which contains a signed certificate, signed using <a href="https://msdn.microsoft.com/en-us/library/acz3y3te(v=vs.110).aspx" rel="nofollow">mage.exe</a>. It successfully created a <code>&lt;X509Certificate&gt;</code> tags which contain the encoded public certificate as far as I can tell embedded within it, of this format:</p>
  
  <blockquote>
    <p>MIIFBDCCA+ygAwIBAgIQeCmDjQ...3OsgfHUZkAl/GR77wxDooVNr2Hk+aohlDpG9J+PxeQiAohItHIG4=</p>
  </blockquote>
  
  <p>How can I read this certificate back as an X509 certificate in C#? I can't seem to find a suitable X509Certificate2 <a href="https://msdn.microsoft.com/en-us/library/system.security.cryptography.x509certificates.x509certificate2.x509certificate2(v=vs.110).aspx" rel="nofollow">constructor</a> to make this magic happen in my C#, .NET application.</p>