Why package a layer when ProtoInclude is used for serialization

[lin12058]

As you can see, I only have one baseclass
As I serialized it, I cannot understand why it is necessary to wrap a layer of completely meaningless data during serialization
Because I have already specified my baseclass in the code
The first character is always 0A, followed by the length of the packaging
And it is completely incompatible with Google's protobuf.js

List<GameObj> arr = [
    new Frame(){id=1,x=4},
    new Control(){id=1,processCount=4},
];

ProtoBuf.Serializer.Deserialize<GameObj>[] // This way, there is packaging

ProtoBuf.Serializer.Deserialize<Control>[] //This way, there is not packaging

The arr here is GameObj, so it will be packaged. If it is written separately, it will not be. However, since you have specified the baseclass, there is no need to package the two bytes of 0A+(length+2) that are not used in this layer

So is there any way to remove it?

笔记
双语对照