How to create indexes in MongoDB via .NET

Question

I\'ve programmatically created a new document collection using the MongoDB C# driver.

At this point I want to create and build indexes programmatically. How can I do

Answer 1

The overload of CreateOneAsync in the currently accepted answer is now marked as obsolete with the message "Use CreateOneAsync with a CreateIndexModel instead." Here's how you do it:

static async Task CreateIndex(string connectionString)
{
    var client = new MongoClient(connectionString);
    var database = client.GetDatabase("HamsterSchool");
    var collection = database.GetCollection("Hamsters");
    var indexOptions = new CreateIndexOptions();
    var indexKeys = Builders.IndexKeys.Ascending(hamster => hamster.Name);
    var indexModel = new CreateIndexModel(indexKeys, indexOptions);
    await collection.Indexes.CreateOneAsync(indexModel);
}