RSACryptoServiceProvider.EncryptValue返回NotSupportedException

Question

我有一个.NET 4.5 MVC应用程序，我正在尝试用RSACryptoServiceProvider来加密一些消息。但是，当我尝试使用EncryptValue()时，我得到一个NotSupportedException。这是我的代码：

     RSACryptoServiceProvider RSA = GetKeyFromContainer(_CONTAINER_NAME);

     byte[] byteEncrypted = RSA.EncryptValue(byteData); //Here is where I get the exception

GetKeyFromContainer方法（从the documentation复制）：

    /// <summary>
    /// Gets the private from the container and generates a new public key
    /// </summary>
    /// <param name="ContainerName"></param>
    /// <returns></returns>
    private RSACryptoServiceProvider 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
        RSACryptoServiceProvider rsa = new RSACryptoServiceProvider(cp);

        return rsa;
    }

.NET 4.5不支持此方法吗？有没有替代方法？