Connection Options

Using the Connection URI

If you pass a connection URI to the MongoClient constructor, you can include connection options in the string as <name>=<value> pairs. In the following example, the connection URI contains the connectTimeoutMS option with a value of 60000 and the tls option with a value of true:

using MongoDB.Driver;
// Connection URI
const string connectionUri = "mongodb+srv://sample.host:27017/?connectTimeoutMS=60000&tls=true";
// Create a new client and connect to the server
var client = new MongoClient(connectionUri);

Using MongoClientSettings

You can use a MongoClientSettings object to configure connection settings in code rather than in a connection URI. Configuring the connection this way makes it easier to change settings at runtime, helps you catch errors during compilation, and provides more configuration options than the connection URI.

To use a MongoClientSettings object, create an instance of the class, set its properties, and pass it as an argument to the MongoClient constructor:

//const string connectionUri = "mongodb+srv://sample.host:27017/?connectTimeoutMS=60000&tls=true";
// Create a MongoClientSettings object
var settings = new MongoClientSettings()
{
    Scheme = ConnectionStringScheme.MongoDBPlusSrv,
    Server = new MongoServerAddress("sample.host", 27017),
    ConnectTimeout = new TimeSpan(0, 0, 60),
    UseTls = true
};
// Create a new client and connect to the server
var client = new MongoClient(settings);

mongodb://user1:password1&authMechanism=GSSAPI
&authMechanismProperties=SERVICE_NAME:other,REALM:otherrealm
&authSource=$external

readPreference=primaryPreferred
&maxStalenessSeconds=90
&readPreferenceTags=dc:ny,rack:1