[TestMethod]

public void TestConnectionCopyPastedFromAtlas36Style()

{

    string conn = "mongodb+srv://xxx:xxx@m10-dev-dgtt4.mongodb.net/test?retryWrites=true&w=majority&serverSelectionTimeoutMS=5000";

    var client = new MongoClient(conn);

    var database = client.GetDatabase("test");

    database.RunCommandAsync((Command<BsonDocument>)"{ping:1}").Wait();

}

[TestMethod]

public void TestConnectionCopyPastedFromAtlas34Style()

{    

    string conn = "mongodb://xxx:xxx@m10-dev-shard-00-00-dgtt4.mongodb.net:27017,m10-dev-shard-00-01-dgtt4.mongodb.net:27017,m10-dev-shard-00-02-dgtt4.mongodb.net:27017/test?ssl=true&replicaSet=m10-dev-shard-0&authSource=admin&retryWrites=true&w=majority";

    var client = new MongoClient(conn);

    var database = client.GetDatabase("test");

    database.RunCommandAsync((Command<BsonDocument>)"{ping:1}").Wait();

}