I have a dictionary that needs to be populated with a list. The code below does not work. How can I fix it?

clientinfo.cs

```
public Dictionary<int, List<string>> Languages { get; set; }

```

main.cs

```
var ClientsData = new List<MapModel.ClientInfo> { }
ClientsData.Add(new MapModel.ClientInfo { Id = IDCounterDoctors, Languages = new Dictionary<int, List<string>>()});
ClientsData[0].Languages.Add(2376, ["english", "french"]); // issue is here

```