在XAML中使用ObservableCollection的无参数构造函数

我已经编辑了这个问题。谢谢你的评论。

看起来我的问题是使用无参数构造函数在XAML中声明类。然而，我似乎无法弄清楚如何获得一个无参数的构造函数与一个可观察的集合。请看下面我的代码:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Serialization;
using System.ComponentModel;
using System.Collections.ObjectModel;
namespace LinkKing.Classes
{
    [Serializable()]
    public class TheLinks
    {
        public string linkID;
        public string parentID;
        public string link;
        public DateTime dateAdded;
        public int stepAdded;
        public string img;
        [System.Xml.Serialization.XmlElement("Link")]
        public string Link
        {
            get { return link; }
            set { link = value; }
        }
        [System.Xml.Serialization.XmlElement("DateAdded")]
        public DateTime DateAdded
        {
            get { return dateAdded; }
            set { dateAdded = value; }
        }
        [System.Xml.Serialization.XmlElement("StepAdded")]
        public int StepAdded
        {
            get { return stepAdded; }
            set { stepAdded = value; }
        }
        [System.Xml.Serialization.XmlElement("LinkID")]
        public string LinkID
        {
            get { return linkID; }
            set { linkID = value; }
        }
        [System.Xml.Serialization.XmlElement("ParentID")]
        public string ParentID
        {
            get { return parentID; }
            set { parentID = value; }
        }
        [System.Xml.Serialization.XmlElement("IMG")]
        public string IMG
        {
            get { return img; }
            set { img = value; }
        }
        public TheLinks(string linkID, string parentID, string link, DateTime dateAdded, int stepAdded, string img) : base()
        {
            this.Link = link;
            this.DateAdded = dateAdded;
            this.StepAdded = stepAdded;
            this.LinkID = linkID;
            this.ParentID = parentID;
            this.IMG = img;
        }
    }
    public class MyLinks : ObservableCollection<TheLinks>
    {
        public MyLinks() : base()
        {
        }
    }
}

我得到的错误是The Type does not include any accessible constructors。

感谢大家的帮助。