MongoDB C# driver - Change Id serialization for inherited class -

i have implemented repository pattern base entity class collections. till collections had _id of objectid type. in code, needed represent id string.

here how entitybase class like

public abstract class entitybase {     [bsonrepresentation(bsontype.objectid)]     public virtual string id { get; set; } } 

here mapping:

bsonclassmap.registerclassmap<entitybase>(cm => {     cm.automap();     cm.mapidproperty(x => x.id).setidgenerator(stringobjectidgenerator.instance);     cm.idmembermap.setserializer(new stringserializer().withrepresentation(bsontype.objectid)); }); 

now have language collection id plain string en-gb.

{    "_id" : "en-gb",    "term1" : "translation 1",    "term2" : "translation 2" } 

language class inheriting entitybase class

public class language : entitybase {     [bsonextraelements]     public idictionary<string, object> terms { get; set; }     public override string id { get; set; } } 

the question can somehow change how id serialized language class?

i don't want change behaviour of entitybase class since have lot of other collections inheriting entitybase.

update

here tried , got exception. not sure if have tried possible.

bsonclassmap.registerclassmap<language>(cm => {     cm.automap();     cm.mapextraelementsmember(c => c.terms);     cm.mapidproperty(x => x.id).setidgenerator(stringobjectidgenerator.instance);     cm.idmembermap.setserializer(new stringserializer().withrepresentation(bsontype.string)); }); 

here exception getting:

an exception of type 'system.argumentoutofrangeexception' occurred in mongodb.bson.dll not handled in user code  additional information: memberinfo argument must class language, class entitybase.  @ mongodb.bson.serialization.bsonclassmap.ensurememberinfoisforthisclass(memberinfo memberinfo) @ mongodb.bson.serialization.bsonclassmap.mapmember(memberinfo memberinfo) @ mongodb.bson.serialization.bsonclassmap`1.mapmember[tmember](expression`1 memberlambda) @ mongodb.bson.serialization.bsonclassmap`1.mapproperty[tmember](expression`1 propertylambda) @ mongodb.bson.serialization.bsonclassmap`1.mapidproperty[tmember](expression`1 propertylambda) @ test.utilities.mongodbclassconfig.<>c.<configure>b__0_1(bsonclassmap`1 cm) in f:\development\test\utilities\mongodbclassconfig.cs:line 23 @ mongodb.bson.serialization.bsonclassmap`1..ctor(action`1 classmapinitializer) @ mongodb.bson.serialization.bsonclassmap.registerclassmap[tclass](action`1 classmapinitializer) @ test.utilities.mongodbclassconfig.configure() in f:\development\test\utilities\mongodbclassconfig.cs:line 20 @ test.portal.backend.startup..ctor(ihostingenvironment env) in f:\development\test\startup.cs:line 43 

when use attribute [bsonrepresentation(bsontype.objectid)] telling serializer, though string — want represented objectid type. "en-gb" not valid objectid therefor, serializer throws exception.

use [bsonid]-attribute if want specify property named id must unique identifier within collection.

there objectid-data type within driver, can implement instead.

i add generic type-parameter entitybase-class.

public abstract class entitybase<tid> {     [bsonid]     public tid id { get; set; } } 

you implement entitybase-class, without generic type argument such:

public abstract class entitybase : entitybase<objectid> { } 

then language-class

public class language : entitybase<string> {     [bsonextraelements]     public idictionary<string, object> terms { get; set; } } 

the driver should not have trouble serializing string-representation of objectid objectid; try first — make sure.