Hi,

I am using .net 2.0 on windows xp (sp2). I wrote following code to import
the certificate into my store name in local machine location:

X509Store myStore = new X509Store(StoreName.My, StoreLocation.LocalMachine);
myStore.Open(OpenFlags.OpenExistingOnly | OpenFlags.ReadWrite);

X509Certificate2 certificate = new X509Certificate2();
certificate.Import(fileName, mypassword, X509KeyStorageFlags.MachineKeySet);
myStore.Add(certificate);
myStore.Close();

The issuer certificate (for the above certificate) is already in the local
machine store.

After wards I write following code to dump the contents of the certificate
(in total different process):

X509Store myStore = new X509Store(StoreName.My, StoreLocation.LocalMachine);
myStore.Open(OpenFlags.ReadOnly);

foreach (X509Certificate2 cert in myStore.Certificates)
{
Console.WriteLine("Issuer: {0}; Subject={1}", cert.Issuer, cert.Subject);
if (!cert.HasPrivateKey)
{
 Console.WriteLine("Certificate has no private key.");
}

RSACryptoServiceProvider rsa = cert.PrivateKey as RSACryptoServiceProvider;
if (rsa != null)
{
 ...
}
}

The above code throws exception on the line that contains cert.PrivateKey
property. It is not cast exception ("Keyset does not exist") since I am
using as operator.

If I delete the certificate and import it through windows Certificates mmc,
my read code executes fine. In both cases, I can check that the imported
certificate has the private key.

Is there some thing wrong in my import code???

Thanks,
Raghu/..