X509Certificate.Export Method
<p>I try export cert .pfx :</p>

<pre><code>string certPath = "D:\\cert.pfx";
cert = new X509Certificate2(certPath, "pass");

byte[] certData = cert.Export(X509ContentType.Pfx,"pass"); /// **error in this line** 

X509Certificate newCert = new X509Certificate(certData,"pass");
</code></pre>

<p>But it finish with this error :</p>

<p><strong>Key not valid for use in specified state.</strong></p>

<p>Can somebody help me ??  Any solution as export certificate from store ??</p>
