public static void ConfigureMapping()
{
var conventionsProfile = new ConventionProfile();
conventionsProfile.SetIgnoreExtraElementsConvention(new AlwaysIgnoreExtraElementsConvention());
conventionsProfile.SetIdMemberConvention(new NamedIdMemberConvention("Id"));
BsonClassMap.RegisterConventions(conventionsProfile, t => typeof(ISagaEntity).IsAssignableFrom(t));
}