Retrieve RSA Keys

We use the RsaProtectedConfigurationProvider to encrypt the connection strings in web.config. Our private key is in a key locker on the server. All of this was accomplished by following the KB instructions.

We would like to use the key pair for some other encryption tasks. I assume this is possible. I've tested retrieving the key with the sample code in the link below but can't get it to work: http://msdn.microsoft.com/en-us/library/tswxhw92(v=vs.85).aspx

Sample code from this page:
public static void GetKeyFromContainer(string ContainerName)
{
// Create the CspParameters object and set the key container
// name used to store the RSA key pair.
CspParameters cp = new CspParameters();
cp.KeyContainerName = ContainerName;

// Create a new instance of RSACryptoServiceProvider that accesses
// the key container MyKeyContainerName.
RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(cp);

// Display the key information to the console.
Console.WriteLine("Key retrieved from container : \n {0}", rsa.ToXmlString(true));
}