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如何在下面的代碼中使對象VirtualTerminal可選?我必須移除VirtualTerminal並只使用VirtualTerminalId嗎?實體框架在數據註釋中有可選
[Table("Computer")]
public class Computer :Device
{
//public int Id { get; set; }
public string OperatingSystem { get; set; }
public string OS_LicenseKey { get; set; }
public VirtualTerminal VirtualTerminal { get; set; }
public int? VirtualTerminalId { get; set; }
}
這種方式不是可選的嗎? –