As I'm studying MongoDB I create a smplest mongodb code as the following:

//-----------Begining-----------

var mongo = MongoServer.Create("mongodb://192.168.56.101:27017"); //My mongodb server runing on my virtual box

for (int i = 0; i < 100000; i++)
{
var tmp = new BsonDocument {

};

mongo["db"]["foo"].Insert(tmp);
}

///--------------End------------//

Simple enough, right? Things got weired when I try to get the count of db.foo, here's the output from my linux console:

1. ./mongo
   MongoDB shell version: 2.0.0
   connecting to: test
   > db.foo.count() <--- Before I ran the sample code above
   0
   > use db
   switched to db db
   > db.foo.count()
   98954 <--- After
   >

//-------

According to the sample code, where it is 98954 should be 100000.

I've repeated this code many times, results vary but none of them reached 100000.

To be more sure, I run the same code using WinForm instead of WinConsole project, magically every single time the result is right. The same with Website Project. So I can be certain there's nothing wrong with my mongodb server but very likely something wrong with the driver with winconsole mode under my VS C# 2010.

I also gave this code to some of my coleagues who confirmed my above findings.