Beginners' guide to using MongoDB 4.0.2 and the official C# driver

namespace TestMongo
{
    using System;
    using System.Collections.Generic;
    using System.Linq;

    using MongoDB.Driver;

    public partial class Program
    {
        #region Methods

        private static void BuildClubMembers(MongoCollection<ClubMember> collection, Random random, int counter)
        {
            string[] forenames = { "Anwen", "David", "Rhys", "Megan", "Sean", "Delyth", "Rhian", "Aled" };
            string[] lastnames = { "Jones", "Davies", "Williams", "Rees", "Parry", "Edwards", "Thomas", "Richards" };
            string[] vintageCars = { "Alvis", "Austin", "Cooper", "Bristol", "Hillman", "Humber", "Riley" };
            Random rand = random;
            for (int i = 0; i < counter; i++)
            {
                int forenameIndex = rand.Next(0, forenames.Count());
                int lastnameIndex = rand.Next(0, lastnames.Count());

                int totalNumberOfCars = rand.Next(0, vintageCars.Count());
                DateTime today = DateTime.Now;
                var member = new ClubMember
                {
                    Forename = forenames[forenameIndex],
                    Lastname = lastnames[lastnameIndex],
                    Age = rand.Next(16, 65),
                    MembershipDate = today.AddDays(-1 * rand.Next(0, 7200))
                };
                if (totalNumberOfCars > 0)
                {
                    member.Cars = new List<string>();
                }
                for (int c = 0; c < totalNumberOfCars; c++)
                {
                    int carIndex = rand.Next(0, vintageCars.Count());
                    member.Cars.Add(vintageCars[carIndex]);
                }

                collection.Insert(member);
            }
        }

        #endregion
    }
}