c# - 在 C# 中克隆一个对象

Question

我想使用 ICloneable 接口(interface)克隆一个对象由于某种原因，我无法在我的程序中克隆。这是我的代码:

public class GeoInfo : ICloneable
{
    private long InfoID;
    private string InfoName;
    private Location InfoLocation;
    private string Description;
    private InfoTypes InfoType;
    public GeoInfo(long InfoID)
    {

        this.InfoID = InfoID;
    }
    public GeoInfo(long InfoID, Location InfoLocation):this(InfoID)
    {
        this.InfoLocation = InfoLocation;
    }
    public GeoInfo(long InfoID, string InfoName, Location InfoLocation, string Description, InfoTypes InfoType):this(InfoID,InfoLocation)
    {
        this.InfoName = InfoName;
        this.Description = Description;
        this.InfoType = InfoType;
    }
    public object ICloneable.Clone()
    {
        GeoInfo toReturn = new GeoInfo(InfoID, InfoName, InfoLocation, Description, InfoType);
        return (object)toReturn;
    }

当我尝试使用 Clone() 方法时，在另一个类中，由于某种原因编译器找不到该方法。这是我尝试克隆的另一种方法:

public InfoLayer(string LayerName,List<GeoInfo> oldGeoInfos)
    {
        this.LayerName = LayerName;
        this.GeoInfos = new List<GeoInfo>();
        oldGeoInfos.ForEach((item) =>
        {
            GeoInfos.Add((GeoInfo)((ICloneable)item.Clone()));
        });
    }

Answer 1

类型转换周围的括号不正确。应该是

GeoInfos.Add((GeoInfo)((ICloneable)item).Clone());

(顺便说一句:为什么是 .ForEach() ？

this.GeoInfos = oldGeoInfos.Select(item => ((GeoInfo)((ICloneable)item.Clone()))).ToList();

也做这项工作。)