C# 在C中创建usercontrol时出现问题#

我正在为一个项目编写用户控件。此控件为要设置的时间范围绘制日历。在此日历中，应显示信息。日历的绘图已经开始工作了。但我现在遇到的问题是将数据绘制到控件中

我已为控件创建了属性，但在DesignMode中始终出现转换错误：

“类型为'Double_D_IT.ClsArticleData[]的对象无法转换为'Double_D_IT.ClsArticleData[]类型”

该地产的建造方式如下：

private List<ClsArticleData> m_lstArticleData;
[Category("Benutzerdefinierte Einstellungen")]
    [Browsable(false)]
    public List<ClsArticleData> ArticleData { get => m_lstArticleData; set { m_lstArticleData = value; this.Invalidate(); } }

    [Serializable()]
[XmlRoot(ElementName = "ArticleData")]
public class ClsArticleData
{
    [XmlElement(ElementName = "ArticleName")]
    private string m_strArticleName;
    [XmlElement(ElementName = "SN")]
    private string m_strSN;
    [XmlElement(ElementName = "Branch")]
    private Int32 m_intBranch;
    [XmlElement(ElementName = "Branchname")]
    private string m_strBranch;
    [XmlArrayItem("QuantityList")]
    private List<ClsQuantityList> m_lstQuantityList;

    public string ArticleName { get => m_strArticleName; set => m_strArticleName = value; }
    public string SN { get => m_strSN; set => m_strSN = value; }
    public int Branch { get => m_intBranch; set => m_intBranch = value; }
    public string BranchName { get => m_strBranch; set => m_strBranch = value; }
    public List<ClsQuantityList> QuantityList { get => m_lstQuantityList; set => m_lstQuantityList = value; }
}


    [Serializable()]
[XmlRoot(ElementName = "QuantityList")]
public class ClsQuantityList
{
    [XmlElement(ElementName = "Date")]
    private DateTime m_datDate;
    [XmlElement(ElementName = "Quantity")]
    private Int32 m_intQuantity;

    public DateTime Date { get => m_datDate; set => m_datDate = value; }
    public int Quantity { get => m_intQuantity; set => m_intQuantity = value; }

私有列表mlstactedata；
[类别（“Benutzerdefinierte Einstellungen”）]
[可浏览（错误）]
public List ArticleData{get=>m_lstacledata；set{m_lstacledata=value；this.Invalidate（）；}

该类如下所示：

private List<ClsArticleData> m_lstArticleData;
[Category("Benutzerdefinierte Einstellungen")]
    [Browsable(false)]
    public List<ClsArticleData> ArticleData { get => m_lstArticleData; set { m_lstArticleData = value; this.Invalidate(); } }

    [Serializable()]
[XmlRoot(ElementName = "ArticleData")]
public class ClsArticleData
{
    [XmlElement(ElementName = "ArticleName")]
    private string m_strArticleName;
    [XmlElement(ElementName = "SN")]
    private string m_strSN;
    [XmlElement(ElementName = "Branch")]
    private Int32 m_intBranch;
    [XmlElement(ElementName = "Branchname")]
    private string m_strBranch;
    [XmlArrayItem("QuantityList")]
    private List<ClsQuantityList> m_lstQuantityList;

    public string ArticleName { get => m_strArticleName; set => m_strArticleName = value; }
    public string SN { get => m_strSN; set => m_strSN = value; }
    public int Branch { get => m_intBranch; set => m_intBranch = value; }
    public string BranchName { get => m_strBranch; set => m_strBranch = value; }
    public List<ClsQuantityList> QuantityList { get => m_lstQuantityList; set => m_lstQuantityList = value; }
}


    [Serializable()]
[XmlRoot(ElementName = "QuantityList")]
public class ClsQuantityList
{
    [XmlElement(ElementName = "Date")]
    private DateTime m_datDate;
    [XmlElement(ElementName = "Quantity")]
    private Int32 m_intQuantity;

    public DateTime Date { get => m_datDate; set => m_datDate = value; }
    public int Quantity { get => m_intQuantity; set => m_intQuantity = value; }

[Serializable（）]
[XmlRoot（ElementName=“ArticleData”）]
公共类ClsArticleData
{
[XmlElement（ElementName=“ArticleName”）]
私有字符串m_strArticleName；
[xmlement（ElementName=“SN”）]
专用字符串mu strSN；
[xmlement（ElementName=“Branch”）]
私人Int32 m_intBranch；
[XmlElement（ElementName=“Branchname”）]
私人字符串m_strBranch；
[XmlArrayItem（“QuantityList”）]
私有列表MlstQuantityList；
公共字符串ArticleName{get=>m_strArticleName；set=>m_strArticleName=value；}
公共字符串SN{get=>m_strSN；set=>m_strSN=value；}
公共int分支{get=>m_intBranch；set=>m_intBranch=value；}
公共字符串BranchName{get=>m_strBranch；set=>m_strBranch=value；}
公共列表QuantityList{get=>MlstQuantityList；set=>MlstQuantityList=value；}
}
[可序列化（）]
[XmlRoot（ElementName=“QuantityList”）]
公共类ClsQuantityList
{
[XmlElement（ElementName=“日期”）]
私有日期时间m_datDate；
[xmlement（ElementName=“数量”）]
私人Int32 m_intQuantity；
公共日期时间日期{get=>m_-datDate；set=>m_-datDate=value；}
公共整数数量{get=>m_intQuantity；set=>m_intQuantity=value；}

这里出了什么问题？我是不是有思想上的错误，或者基本想法是错误的？你有没有更好的建议