'System.FormatException' occurred in MongoDB.Bson.dll when trying to use Builders<BsonDocument>

[Ross McTague]

I have am able to query and insert new documents just fine, however, when I try to build an update document I get an error:

A first chance exception of type 'System.FormatException' occurred in MongoDB.Bson.dll

I an using the example straight from the site

var update = Builders<BsonDocument>.Update.Set("i", 100);

yet I STILL get the same error. 

I am using the 2.0 driver with VS2013, the driver was downloaded using NuGet. Anyone have a suggestion as to why this is happening?

[Craig Wilson]

Hi Ross,

Sorry you are having issues. However, that line of code works for me all by itself and doesn't generate an exception (and we have tests doing just that). Hence, a more complete example of the problem is necessary. Perhaps you could provide a method that exemplifies the problem so we can try and reproduce.  In addition, could we have the stacktrace of the exception? 

Craig