如何使用反射将List<TBase>转换为List<TChild> (不使用Linq Cast<>)？

public static List<TChild> ConvertList<TBase, TChild>(List<TBase> baseList) where TChild : TBase
{
    List<TChild> childList = new List<TChild>();

    foreach (TBase baseItem in baseList)
    {
        if (baseItem is TChild)
        {
            childList.Add((TChild)baseItem);
        }
        else
        {
            Type childType = typeof(TChild);
            TChild childItem = (TChild)Activator.CreateInstance(childType);

            PropertyInfo[] properties = baseItem.GetType().GetProperties();
            foreach (PropertyInfo property in properties)
            {
                PropertyInfo childProperty = childType.GetProperty(property.Name);
                if (childProperty != null && childProperty.CanWrite)
                {
                    childProperty.SetValue(childItem, property.GetValue(baseItem));
                }
            }

            childList.Add(childItem);
        }
    }

    return childList;
}