title: Where do I get an x509 certificate from?
body: <p>I'm currently trying to create a chat based on the SslStream class.
  I was going through that msdn link: <a href="http://msdn.microsoft.com/en-us/library/system.net.security.sslstream.aspx" rel="noreferrer">click here</a></p>
  
  <p>I realized that I need to get an X509Certificate to establish that task. But I really don't know how can I get one? I know that there are ones who cost money, but there aren't free ones available? </p>
  
  <p>P.S: I'm coming here after doing some search in google about that subject but haven't found any helpfull infomation.</p>
  
  <p>So my question is: Where can I get an x509 certificate? </p>
  
  <p>Thank you.</p>