小编Pau*_*der的帖子

我最近了解yield并创建了以下测试控制台程序：

    public static string Customers = "Paul,Fred,Doug,Mark,Josh";
    public static string Admins = "Paul,Doug,Mark";

    public static void Main()
    {
        var test = CreateEfficientObject();

        Console.WriteLine(test.Admins.FirstOrDefault());
        //Note that 'GetAllCustomers' never runs. 
    }

    public static IEnumerable<string> GetAllCustomers()
    {
        var databaseFetch = Customers.Split(',');
        foreach (var s in databaseFetch)
        {
            yield return s;
        }
    }

    public static IEnumerable<string> GetAllAdmins()
    {
        var databaseFetch = Admins.Split(',');
        foreach (var s in databaseFetch)
        {
            yield return s;
        }
    }

    static LoginEntitys CreateEfficientObject()
    {
        var returnObject = new LoginEntitys …