如何将序列化的字节数组转换回其文本形式

我有一个文本，它是一个对象的属性。对象获得XmlSerialized，之后在XML调用Text中有一个元素表示对象中的文本。我想知道如何把它变成绳子。

串行化的类型：XmlSerializer serizlizer = new XmlSerializer(typeof(Act));

类中的属性：

[System.Runtime.Serialization.OptionalFieldAttribute()]
private byte[] ActTextField;

在xml文件中，它看起来像这样：

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

我甚至无法想象它的编码是什么以及如何解码。我试图将它读取到字节数组中，但在应用了一些解码后，它实际上没有工作Encode.UTF8、Encode.ASCII、

byte[] data = Convert.FromBase64String(base64Text);