How to use $push update modifier in MongoDB and C#, when updating an array in a document

Question

I\'ve run the following code in mongo shell:

db.unicorns.insert({name:  \'Dunx\',  loves:  [\'grape\',  \'watermelon\']});

and now I\'ve so

Answer 1

To do this with the updated syntax and regular BsonDocuments instead of defined objects, use the following:

var filter = Builders<BsonDocument>.Filter.Eq("name": "Aurora");
var update = Builders<BsonDocument>.Update.Push("loves", "sugar"):

// you can also use the async update method from Alex's answer here
var result = fantasyContext.Unicorns.UpdateOne(filter, update);

Answer 2

it should be something like this:

unicorns.Update(Query.EQ("name", "Aurora"), Update.Push("loves", "sugar"));

Answer 3

I would like to also illustrate how to do it using a different syntax

var filter = Builders<Unicorn>
             .Filter.Eq(e => e.Name, "Aurora");

var update = Builders<Unicorn>.Update
        .Push<String>(e => e.Likes, like);

await fantasyContext.Unicorns.FindOneAndUpdateAsync(filter, update);