Incompatibility between Protobuf-net and Protobuf-csharp-port

xJayLee / protobuf-net

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Kris.VanHoye@Avalon-automation.be ============== InvalidProtocolBufferException was unhandled Message missing required fields: Childs[1].ValueBool ============== We try to communicate via C# Protobuf-net lib to an Objective-C app that use the Protobuf serialization. The problem we have is that the current version (V2475) in our POC is not compatible. We miss to bytes with the Protobuf.net lib. I added a really small test project to this Issue. Hopefully you can find some time to look to it because I prefer your lib. Greetings, KVH

This is due to a subtle difference in the processing of default values, and how 
protobuf-net decides whether or not to include a value. In this case, the 
simplest behaviour is to ask it to always include `ValueBool` explicitly:

    [ProtoMember(2, IsRequired = true)]

(in 2 places, IIRC)

There are a number of ways of deciding the conditional serialization rules in 
protobuf-net, including:

- Nullable<bool>
- ShouldSerialize{PropertyName} (pattern from XmlSerializer and ComponentModel)
- {PropertyName}Specified (pattern from XmlSerializer)

it can *also* be influenced by [DefaultValue(...)], and in v2 the implicit 
defaults can be disabled if desired.

But: adding IsRequired fixes it in your example.

Original comment by marc.gravell on 7 Dec 2011 at 3:50

xJayLee / protobuf-net

Incompatibility between Protobuf-net and Protobuf-csharp-port #258