Every time the configuration is different than the previous call to replSetReconfig, RunCommand on the MongoDatabase object in the C# driver throws the following exception.

at MongoDB.Bson.IO.ByteBufferFactory.LoadFrom(Stream stream)
at MongoDB.Driver.Internal.MongoConnection.ReceiveMessage[TDocument](BsonBinaryReaderSettings readerSettings, IBsonSerializer serializer, IBsonSerializationOptions serializationOptions)
at MongoDB.Driver.Operations.CommandOperation`1.Execute(MongoConnection connection)
at MongoDB.Driver.MongoDatabase.RunCommandAs[TCommandResult](IMongoCommand command, IBsonSerializer resultSerializer, IBsonSerializationOptions resultSerializationOptions)
at MongoDB.Driver.MongoDatabase.RunCommandAs[TCommandResult](IMongoCommand command)
at MongoDB.Driver.MongoDatabase.RunCommand(IMongoCommand command)
at [MYCODE]