How to serialize/deserialize large list of items with protobuf-net

Question

I have a list of about 500 million items. I am able to serialize this into a file with protobuf-net file if I serialize individual items, not a list -- I cannot collect the item

Answer 1

The API apprently has changed since Marc's answer.
It seems there's no SerializeItems method any more.

Here's some more up to date info that should help:

ProtoBuf.Serializer.Serialize(stream, items);

can take an IEnumerable as seen above and it does the job when it comes to serialization.
However there's a DeserializeItems(...) method and the devil is in the details :)
If you serialize IEnumerable like above, then you need to call DeserializeItems passing PrefixStyle.Base128 and 1 as fieldNumber cause apprently those are the defaults.
Here's an example:

ProtoBuf.Serializer.DeserializeItems(stream, ProtoBuf.PrefixStyle.Base128, 1));

Also as pointed out by Marc and Vic you can serialize/deserialize on a per item basis like this (using custom values for PrefixStyle and fieldNumber):

ProtoBuf.Serializer.SerializeWithLengthPrefix(stream, item, ProtoBuf.PrefixStyle.Base128, fieldNumber: 1);

and

T item;
while ((item = ProtoBuf.Serializer.DeserializeWithLengthPrefix(stream, ProtoBuf.PrefixStyle.Base128, fieldNumber: 1)) != null)
{
    // do stuff here
}