Hi

Based on my experience, there is no method in .net framework to load a
X509Certificate  from memory.
But if we have used the code below to load certificate from file to
X509Certificate  object, we can just use the cert ,
X509Certificate cert = X509Certificate.CreateFromCertFile(Certificate);

or we can contruct a new X509Certificate from a X509Certificate instance.
public X509Certificate(X509Certificate);

If I have any misunderstanding, please feel free to post here.

Best regards,

Peter Huang
Microsoft Online Partner Support

Hello!
You wrote  on Mon, 18 Oct 2004 15:26:25 -0400:

l> I see that X509Certificate only has a method for reading from a file.
l> I have some proxy code that is called multiple times and I don't want
l> to read from a file every time.  Is there a way to read that CER into
l> a MemoryStream and use that instead of file-read?

You can do what you need with freeware PKIBlackbox ( http://www.secureblackbox.com/description-sec-pkiblackbox.html)
which has a good structure of classes and lets you perform the necessary
operations with 1 method call.

With best regards,
Eugene Mayevski