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Insert json file containing an array of json documents into ammongodb collection using BsonDocument BsonArray

I am working on a method to asynchronously read the contents of a json file ( containing an array of json objects) and insert it into a mongodb collection but I cannot figure out what the issue is. There is no error when debugging, but my collection is still empty.

 public async void InsertDocumentsInCollection(string File)
                    {
                        string text = System.IO.File.ReadAllText(File);
                        IEnumerable<BsonDocument> doc = BsonSerializer.Deserialize<BsonArray>(text).Select(p => p.AsBsonDocument);
            //Name of the collection is Cars
                        var collection = _database.GetCollection<BsonDocument>("Cars");
                        await collection.InsertManyAsync(doc);  
                    }

i tried to reproduce the issue with the following, but it works just fine. maybe it's something wrong with the contents of the text file. can you post a sample of the file?

using MongoDB.Bson;
using MongoDB.Bson.Serialization;
using MongoDB.Driver;
using System.IO;
using System.Linq;
using System.Threading.Tasks;

namespace StackOverflow
{
    public class Program
    {
        private static async Task Main(string[] args)
        {
            var content = File.ReadAllText("E:\\Downloads\\cars.txt"); //https://mongoplayground.net/p/LY0W7vjDuvp

            var docs = BsonSerializer.Deserialize<BsonArray>(content).Select(p => p.AsBsonDocument);

            var collection = new MongoClient("mongodb://localhost")
                                    .GetDatabase("test")
                                    .GetCollection<BsonDocument>("Cars");

            await collection.InsertManyAsync(docs);
        }
    }
}

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