Aes Encryption For Custom(User defined type) class C#

Can I use the Aes Encryption technique to encrypt/decrypt a user defined type. In this link the encryption is done for a simple string. But Suppose I want to encrypt my below user defined type.

public class Person
{
    public string FirstName { get; set; }
    public string LastName { get; set; }
}

How it can be done.

Or is there any other alternative way to do it.

P.S - I have tried following after Jon's answer but while I am getting an exception "Length of the data to decrypt is invalid" while decrypting the data. I am using following code to encrypt and decrypt the data.

[Serializable]
public class Person:ISerializable 
{
    public string FirstName { get; set; }
    public string LastName { get; set; }

    public void GetObjectData(SerializationInfo info, StreamingContext context)
    {
        info.AddValue("FirstName", FirstName);
        info.AddValue("LastName", LastName);
    }

    public Person()
    {

    }

    public Person(SerializationInfo info, StreamingContext ctxt)
    {
        FirstName = (string)info.GetValue("FirstName", typeof(string));
        LastName = (string)info.GetValue("LastName", typeof(string));
    }
}



 static void Main(string[] args)
        {
            Person per = new Person() { FirstName = "Vikram", LastName = "Chaudhary" };                   
            using (AesManaged aes = new AesManaged())
            {
                byte[] encrypted = EncryptStringToBytes_Aes(per, aes.Key, aes.IV);

                byte[] decrypted = DecryptStringFromBytes_Aes(encrypted, aes.Key, aes.IV);
            }
        }


 static byte[] EncryptStringToBytes_Aes(Person plainText, byte[] Key, byte[] IV)
    {
        MemoryStream stream = new MemoryStream();
        BinaryFormatter bFormatter = new BinaryFormatter();
        bFormatter.Serialize(stream, plainText);

        byte[] encrypted;
        // Create an AesManaged object 
        // with the specified key and IV. 
        using (AesManaged aesAlg = new AesManaged())
        {
            aesAlg.Key = Key;
            aesAlg.IV = IV;

            // Create a decrytor to perform the stream transform.
            ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);

            // Create the streams used for encryption. 
            using (MemoryStream msEncrypt = new MemoryStream())
            {
                using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
                {                       

                    csEncrypt.Write(stream.ToArray(), 0, stream.ToArray().Length);
                    csEncrypt.Close();
                }
            }
        }
        // Return the encrypted bytes from the memory stream. 
        byte[] encryptedData = stream.ToArray();
        return encryptedData;

    }

    static byte[] DecryptStringFromBytes_Aes(byte[] cipherText, byte[] Key, byte[] IV)
    {
        byte[] decryptedData;            

        // Declare the string used to hold 
        // the decrypted text. 
        string plaintext = null;
        Person decryptedObject = null;

        // Create an AesManaged object 
        // with the specified key and IV. 
        using (AesManaged aesAlg = new AesManaged())
        {
            aesAlg.Key = Key;
            aesAlg.IV = IV;

            // Create a decrytor to perform the stream transform.
            ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);

            // Create the streams used for decryption. 
            using (MemoryStream msDecrypt = new MemoryStream())
            {
                using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Write))
                {                    
                    csDecrypt.Write(cipherText, 0, cipherText.Length);                     
                }

                 decryptedData = msDecrypt.ToArray();
            }
        }
        return decryptedData;
    }

Please let me know what I am doing wrong.