MongoDB: Getting the list of all databases?

Question

How do I list all databases for a connection using Mongo C# Driver?

Answer 1

I wasn't able validate if a given DB exists or not with the existing answers, so here's my take on it:

    // extension method on IMongoClient
    public static IMongoClient AssertDbExists(this IMongoClient client, string dbName)
    {
        bool dbFound = false;

        using(var cursor = client.ListDatabases())
        {
            var databaseDocuments = cursor.ToList();
            foreach (var db in databaseDocuments)
            {
                if (db["name"].ToString().Equals(dbName))
                {
                    dbFound = true;
                    break;
                }
            }
        }

        if (!dbFound) throw new ArgumentException("Can't connect to a specific database with the information provided", nameof(MongoSettings.ConnectionString));

        return client;
    }

And then use it like this:

// either you get the client with the DB validated or throws
_client = new MongoClient(settings.ConnectionString).AssertDbExists(_dbName);

Using: Mongo Official C# driver v2.4.4