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我使用代码优先，并试图生成一些示例数据，但被卡住了。

       var ts = new List<VehicleType>
        {       new VehicleType { TypeName = "Car" },
                new VehicleType { TypeName = "Truck" },
                new VehicleType { TypeName = "Van" },
                new VehicleType { TypeName = "SUV" },
                new VehicleType { TypeName = "RV" }
            };


        var mr = new List<Manufacturer>{
                new Manufacturer { ManufacturerName = "Ford" },
                new Manufacturer { ManufacturerName = "Dodge" },
                new Manufacturer { ManufacturerName = "Hyundai" },
                new Manufacturer { ManufacturerName = "Mazda" },
                new Manufacturer { ManufacturerName = "Honda" },
                new Manufacturer { ManufacturerName = "Lexus" },
                new Manufacturer { ManufacturerName = "Cadillac" },
                new Manufacturer { ManufacturerName = "Jayco" }
    };

        var vm = new List<VehicleModel>{
                new VehicleModel { ModelName = "Focus" },
                new VehicleModel { ModelName = "Elantra" },
                new VehicleModel { ModelName = "3" },
                new VehicleModel { ModelName = "4X4" },
                new VehicleModel { ModelName = "CRX" },
                new VehicleModel { ModelName = "Element" },
                new VehicleModel { ModelName = "SE 541" },
                new VehicleModel { ModelName = "LE 4X" }
    };

        new List<Inventory>
        {
            new Inventory {VehicleModel = vm.Single(g => g.ModelName == "Focus"), Manufacturer = mr.Single(g => g.ManufacturerName == "Ford"), VehicleType = ts.Single(g => g.TypeName == "Car"), Price = 10999, Mileage = 241092, Year = 2001, Description = "Includes all G37x AWD Sport standard equipment FORD", Colour = "Tan", CarImageUrl = "/Content/Images/car1.jpg", DateReceived = "01/06/2011"}, 

}.ForEach(a => context.Inventorys.Add(a));

这工作正常。我的 Inventory 表中填充了来自其他表（VehicleType、Manufacturer 和 VehicleModel）的数据。以下是他们的模型：

public class Manufacturer
{
    [Key]
    public int ManufacturerId { get; set; }
    public string ManufacturerName { get; set; }

}

public class VehicleModel
{
    [Key]
    public int ModelID { get; set; }
    public string ModelName { get; set; }
}
public class VehicleType
{
    [Key]
    public int TypeId { get; set; }
    public string TypeName { get; set; }
}

现在让我们说制造商模型除了制造商名称之外还有另一个属性，假设它还有制造商位置。当我尝试将该属性添加到库存列表中时：

new List<Inventory>
        {
new Inventory {VehicleModel = vm.Single(g => g.ModelName == "Focus"), Manufacturer = mr.Single(g => g.SomeAttributeFromManufacturerTable)

制造商表中的所有属性都会出现，但在我使用其中一个属性后，似乎没有机会输入其余属性。这是因为它希望我输入 ManufacturerId 属性，它会通过其主键自动关联属性上的其余部分吗？我希望我说得通，我觉得这很难解释。

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