C#使用反射(Reflection)实现深复制与浅复制

class Program
{
    public static void Main(string[] args)
    {
        var classA1 = new ClassA
        {
            a = 1,
            b = "haha",
            d = new ClassB{ c ="haha" }
        };

        var classA2 = (ClassA)classA1.Clone();

        classA2.b = "xixi";
        classA2.d.c = "xixi";

        Console.WriteLine("classA1.b=" + classA1.b + "\nclassA2.b=" + classA2.b);
        Console.WriteLine("classA1.d.c=" + classA1.d.c + "\nclassA2.d.c=" + classA2.d.c);
    }
}

public class ClassA : ICloneable
{
    public int a;

    public string b;

    public ClassB d;


    public object Clone()
    {
        object obj = new ClassA();
        //字段
        FieldInfo[] fields = typeof(ClassA).GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
        for (int i = 0; i < fields.Length; i++)
        {
            FieldInfo field = fields[i];
            field.SetValue(obj, field.GetValue(this));
        }
        //属性
        PropertyInfo[] properties = typeof(ClassA).GetProperties(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
        for (int i = 0; i < properties.Length; i++)
        {
            PropertyInfo property = properties[i];
            property.SetValue(obj, property.GetValue(this));
        }
        return obj;
    }
}

public class ClassB
{
    public string c;
}

public static object DeepClone(Object obj)
{
    Type type = obj.GetType();
    //对于没有公共无参构造函数的类型此处会报错
    object returnObj = Activator.CreateInstance(type);
    FieldInfo[] fields = type.GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
    for (int i = 0; i < fields.Length; i++)
    {
        FieldInfo field = fields[i];
        var fieldValue = field.GetValue(obj);
        ///值类型，字符串，枚举类型直接把值复制，不存在浅拷贝
        if (fieldValue.GetType().IsValueType || fieldValue.GetType().Equals(typeof(System.String)) || fieldValue.GetType().IsEnum)
        {
            field.SetValue(returnObj, fieldValue);
        }
        else
        {
            field.SetValue(returnObj, DeepClone(fieldValue));
        }
    }
    //属性
    PropertyInfo[] properties = typeof(ClassA).GetProperties(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
    for (int i = 0; i < properties.Length; i++)
    {
        PropertyInfo property = properties[i];
        var propertyValue = property.GetValue(obj);
        if (propertyValue.GetType().IsValueType || propertyValue.GetType().Equals(typeof(System.String)) || propertyValue.GetType().IsEnum)
        {
            property.SetValue(returnObj, propertyValue);
        }
        else
        {
            property.SetValue(returnObj, DeepClone(propertyValue));
        }
    }

    return returnObj;
}