数据库存储的物料清单编码

我正在使用以下代码序列化对象:

public static string Serialise(IMessageSerializer messageSerializer, DelayMessage message)
{
    using (var stream = new MemoryStream())
    {
        messageSerializer.Serialize(new[] { message }, stream);

        return Encoding.UTF8.GetString(stream.ToArray());
    }
}

不幸的是,当我将其保存到数据库(使用Linq to SQL)中,然后查询数据库时,字符串似乎以问号开头:

?<z:anyType xmlns...

我该怎么处理?当我尝试使用以下方法去序列化时:

public static DelayMessage Deserialise(IMessageSerializer messageSerializer, string data)
{
    using (var stream = new MemoryStream(Encoding.UTF8.GetBytes(data)))
    {
        return (DelayMessage)messageSerializer.Deserialize(stream)[0];
    }
}

我得到以下例外:

“第1行位置1出错。期望 命名空间中的元素“anyType” ’ http://schemas.microsoft.com/2003/10/Serialization/ … 遇到名为“”的“text”, 命名空间的''.

的实现 messageSerializer 使用 DataContractSerializer 如下:

public void Serialize(IMessage[] messages, Stream stream)
{
    var xws = new XmlWriterSettings { ConformanceLevel = ConformanceLevel.Fragment };
    using (var xmlWriter = XmlWriter.Create(stream, xws))
    {
        var dcs = new DataContractSerializer(typeof(IMessage), knownTypes);
        foreach (var message in messages)
        {
            dcs.WriteObject(xmlWriter, message);
        }
    }
}

public IMessage[] Deserialize(Stream stream)
{
    var xrs = new XmlReaderSettings { ConformanceLevel = ConformanceLevel.Fragment };
    using (var xmlReader = XmlReader.Create(stream, xrs))
    {
        var dcs = new DataContractSerializer(typeof(IMessage), knownTypes);
        var messages = new List<IMessage>();
        while (false == xmlReader.EOF)
        {
            var message = (IMessage)dcs.ReadObject(xmlReader);
            messages.Add(message);
        }
        return messages.ToArray();
    }
}