[Serializable]
public class UserInfo
{
    public string Name { get; set; }
    public int Age { get; set; }
}

public class XmlSerialization
{
    public static void XmlSerialize(UserInfo user)
    {
        XmlSerializer serializer = new XmlSerializer(typeof(UserInfo));
        StreamWriter sw = new StreamWriter("UserInfo.xml");
        serializer.Serialize(sw, user);
        sw.Close();
    }

    public static UserInfo XmlDeserialize()
    {
        XmlSerializer serializer = new XmlSerializer(typeof(UserInfo));
        FileStream fs = new FileStream("UserInfo.xml", FileMode.Open);
        UserInfo user = serializer.Deserialize(fs) as UserInfo;
        fs.Close();
        return user;
    }
}

public class RuntimeSerialization
{
    public static void BinarySerialize(UserInfo user)
    {
        FileStream fs = new FileStream(@"SerializeFile\UserInfo.bin", FileMode.Append);
        BinaryFormatter formatter = new BinaryFormatter();
        formatter.Serialize(fs, user);
        fs.Close();
    }

    public static UserInfo BinaryDeserialize()
    {
        FileStream fs = new FileStream(@"SerializeFile\UserInfo.bin", FileMode.Open, FileAccess.Read, FileShare.Read);
        BinaryFormatter formatter = new BinaryFormatter();
        UserInfo user = formatter.Deserialize(fs) as UserInfo;
        fs.Close();
        return user;
    }
}