I'm trying to use .NET Guid as document id for my mongodb documents. The problem that I face now is that I can't fetch new document by id after insertion:

MongoCollection.AsQueryable().Where(user => user.Id == id)

I saw that Guid bytes are reversed in MongoDb, so I tried something like this:

public TData GetById(Guid id)

{ var reverseId = Reverse(id); return MongoCollection.AsQueryable() .Where(user => user.Id == reverseId) as TData; }

private static Guid Reverse(Guid initial)

{ byte[] guidBytes = initial.ToByteArray(); Array.Reverse(guidBytes, 0, 4); Array.Reverse(guidBytes, 4, 2); Array.Reverse(guidBytes, 6, 2); return new Guid(guidBytes); }

Still, it does not work... Please help.