efcoreinmemorythree.cs

public class tblSellersBuilder
{
    private readonly tblSellers _tblSellers;
    private readonly Random _random;

    public tblSellersBuilder(Random random = null)
    {
        _random = random ?? new Random();
        _tblSellers = new tblSellers
        {
            Id = _random.Next(),
            Name = _random.Next().ToString(),
            Url = _random.Next().ToString(),
        };
    }

    public tblSellers Build()
    {
        return _tblSellers;
    }

    public tblSellersBuilder WithId(int id)
    {
        _tblSellers.Id = id;
        return this;
    }

    public tblSellersBuilder WithName(string name)
    {
        _tblSellers.Name = name;
        return this;
    }

    public tblSellersBuilder WithUrl(string url)
    {
        _tblSellers.Url = url;
        return this;
    }

    public static void Initialize(StockNotificationContext stockNotificationContext)
    {
        var listOfSellers = new List<tblSellers>();
        listOfSellers.Add(new tblSellersBuilder().WithId(1).WithName("Amazon").WithUrl("https://www.amazon.co.uk").Build());
        listOfSellers.Add(new tblSellersBuilder().WithId(2).WithName("Ebay").WithUrl("https://www.ebay.co.uk").Build());
        listOfSellers.Add(new tblSellersBuilder().WithId(3).WithName("Currys PC World").WithUrl("https://www.currys.co.uk").Build());
        listOfSellers.Add(new tblSellersBuilder().WithId(4).WithName("Argos").WithUrl("https://www.argos.co.uk").Build());
        listOfSellers.Add(new tblSellersBuilder().WithId(5).WithName("Smyths").WithUrl("https://www.smythstoys.com").Build());
        listOfSellers.Add(new tblSellersBuilder().WithId(6).WithName("Target").WithUrl("https://www.target.com").Build());
        listOfSellers.Add(new tblSellersBuilder().WithId(7).WithName("Best Buy").WithUrl("https://www.bestbuy.com").Build());
        listOfSellers.Add(new tblSellersBuilder().WithId(8).WithName("Walmart").WithUrl("https://www.walmart.com").Build());

        stockNotificationContext.tblSellers.AddRange(listOfSellers);
        stockNotificationContext.SaveChanges();
    }
}