How can I tell the MongoDB C# driver to store all Guids in string format?

Question

I\'m currently applying the [BsonRepresentation(BsonType.String)] attribute to all Guid properties in my domain models to have those properties ser

Answer 1

ConventionProfile was deprecated. If you don't want to apply the rule globally, but only for a specific class (this should go somewhere in your app startup):

var pack = new ConventionPack { new GuidAsStringRepresentationConvention () };
ConventionRegistry.Register("GuidAsString", pack, t => t == typeof (MyClass));

public class GuidAsStringRepresentationConvention : ConventionBase, IMemberMapConvention
    {
        public void Apply(BsonMemberMap memberMap)
        {
            if (memberMap.MemberType == typeof(Guid))
            {
                var serializer = memberMap.GetSerializer();
                var representationConfigurableSerializer = serializer as IRepresentationConfigurable;
                if (representationConfigurableSerializer != null)
                {
                    var reconfiguredSerializer = representationConfigurableSerializer.WithRepresentation(BsonType.String);
                    memberMap.SetSerializer(reconfiguredSerializer);
                }
            }
        }
    }