protobuf-net可以处理自动只读属性吗？

Question

protobuf-net是否可以处理新的自动只读属性，即使用单个get定义的自动属性，而不使用private set

public class WithReadonlyProperty {
    public int ReadonlyProperty { get; }
    public WithReadonlyProperty(int val) {
        ReadonlyProperty = val;
    }
}

当我这样做的时候

RuntimeTypeModel
    .Default
    .Add(typeof (WithReadonlyProperty), false)
        .Add(nameof(WithReadonlyProperty.ReadonlyProperty));
var test = new WithReadonlyProperty(12345);
using (var output = File.Create(@"c:\temp\_readonly.bin")) {
    try {
        Serializer.Serialize(output, test);
    } catch (Exception e) {
        Console.WriteLine(e);
    }
}

我得到了这个例外：

System.InvalidOperationException: Cannot apply changes to property WithReadonlyProperty.ReadonlyProperty
   at ProtoBuf.Serializers.PropertyDecorator.SanityCheck(TypeModel model, PropertyInfo property, IProtoSerializer tail, Boolean& writeValue, Boolean nonPublic, Boolean allowInternal) in c:\Dev\protobuf-net\protobuf-net\Serializers\PropertyDecorator.cs:line 46
   at ProtoBuf.Serializers.PropertyDecorator..ctor(TypeModel model, Type forType, PropertyInfo property, IProtoSerializer tail) in c:\Dev\protobuf-net\protobuf-net\Serializers\PropertyDecorator.cs:line 32
   at ProtoBuf.Meta.ValueMember.BuildSerializer() in c:\Dev\protobuf-net\protobuf-net\Meta\ValueMember.cs:line 375
   at ProtoBuf.Meta.MetaType.BuildSerializer() in c:\Dev\protobuf-net\protobuf-net\Meta\MetaType.cs:line 408
   at ProtoBuf.Meta.MetaType.get_Serializer() in c:\Dev\protobuf-net\protobuf-net\Meta\MetaType.cs:line 384
   at ProtoBuf.Meta.RuntimeTypeModel.Serialize(Int32 key, Object value, ProtoWriter dest) in c:\Dev\protobuf-net\protobuf-net\Meta\RuntimeTypeModel.cs:line 752
   at ProtoBuf.Meta.TypeModel.SerializeCore(ProtoWriter writer, Object value) in c:\Dev\protobuf-net\protobuf-net\Meta\TypeModel.cs:line 186
   at ProtoBuf.Meta.TypeModel.Serialize(Stream dest, Object value, SerializationContext context) in c:\Dev\protobuf-net\protobuf-net\Meta\TypeModel.cs:line 217
   at ProtoBuf.Serializer.Serialize[T](Stream destination, T instance) in c:\Dev\protobuf-net\protobuf-net\Serializer.cs:line 86
    ...

是否可以将protobuf-net配置为使用公共构造函数？有没有别的办法呢？如果可能的话，我希望避免使用属性来修饰WithReadonlyProperty类。

Answer 1

Protobuf可以使用私有构造函数，所以也许你可以让protobuf使用私有构造函数？