Get all documents from a MongoDB collection:
Using the current version of the driver (v2.0) you can do that by passing a filter that matches everything:
var documents = await SpeCollection.Find(_ => true).ToListAsync();
They have also added an empty filter (FilterDefinition.Empty) which will arrive in the next version of the driver (v2.1):
var documents = await SpeCollection.Find(Builders.Filter.Empty).ToListAsync();