// Your MongoDB connection string.

var connectionString = "mongodb://localhost:27017";
BsonSerializer.RegisterSerializer(new GuidSerializer(GuidRepresentation.Standard));

//uncomment this line, and all will work properly, but this will be obsolete
//BsonDefaults.GuidRepresentation = GuidRepresentation.Standard; 

// Create a MongoClient object.
var client = new MongoClient(connectionString);

// Get your database (replace "yourDatabase" with your database name).
var database = client.GetDatabase("test");

// Get your collection (replace "yourCollection" with your collection name).
var collection = database.GetCollection<TestObject>("guids");

TestObject testObject = new TestObject
{
    Id = 1,
    Name = "aaaaaaaaaa",
    Guids = new List<Guid>()
    {
        Guid.NewGuid(),
        Guid.NewGuid()
    },
    Objects = new Dictionary<string, object>()
    
};

testObject.Objects.Add("guids", new List<Guid>()
    {
        Guid.NewGuid(),
        Guid.NewGuid()
    });

testObject.Objects.Add("guid", Guid.NewGuid());


// Insert the TestObject instance into the collection.
collection.InsertOne(testObject);

Console.WriteLine("TestObject inserted successfully.");

Console.ReadKey();



public class TestObject
{
    [BsonId]
    public int Id { get; set; }

    public string Name { get; set; }

 
    public IEnumerable<Guid> Guids { get; set; }

    public Dictionary<string, object> Objects { get; set; }

}