c# - ConfigurationCollection - 認識されない要素 'エントリ'

Question

誰かが私がここで間違っていることを理解するのを手伝ってくれることを願っています. web.config にカスタム セクションがあります。

<invalidCharactorGroup>
 <entries>
   <entry name="entry1" oldChar="É" newChar="E"/>
   <entry name="entry2" oldChar="B" newChar="C"/>
 </entries>
</invalidCharactorGroup>

宣言

<sectionGroup name="invalidCharactorGroup">
  <section name="entries" 
           type="WSTG.Config.InvalidCharactorSection, WSTGEcomLibrary, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" 
           allowLocation="true" 
           allowDefinition="Everywhere" />          
</sectionGroup>

このエラーが発生します：

Unrecognized element 'entry'.

ここに私のクラスがあります：

public class InvalidCharactorSection : ConfigurationSection
{
    [ConfigurationProperty("entries")]
    [ConfigurationCollection(typeof(InvalidEntryElementCollection), AddItemName = "entry")]
    public InvalidEntryElementCollection Entries
    {
        get { return ((InvalidEntryElementCollection)(base["entries"])); }
        set { base["entries"] = value; }
    }
}


public class InvalidEntryElementCollection : ConfigurationElementCollection
{
    internal const string PropertyName = "Entry";

    public override ConfigurationElementCollectionType CollectionType
    {
        get
        {
            return ConfigurationElementCollectionType.BasicMapAlternate;
        }
    }
    protected override string ElementName
    {
        get
        {
            return PropertyName;
        }
    }

    protected override bool IsElementName(string elementName)
    {
        return elementName.Equals(PropertyName, StringComparison.InvariantCultureIgnoreCase);
    }


    public override bool IsReadOnly()
    {
        return false;
    }


    protected override ConfigurationElement CreateNewElement()
    {
        return new Entry();
    }

    protected override object GetElementKey(ConfigurationElement element)
    {
        return ((Entry)(element)).name;
    }

    public Entry this[int idx]
    {
        get
        {
            return (Entry)BaseGet(idx);
        }
    }
}


public class Entry : ConfigurationElement
{
    [ConfigurationProperty("name", DefaultValue = "", IsKey = true, IsRequired = true)]
    public string name
    {
        get { return (string)base["name"]; }
        set { base["name"] = value; }
    }
    [ConfigurationProperty("oldChar", DefaultValue = "", IsKey = false, IsRequired = true)]
    public string oldChar
    {
        get { return (string)base["oldChar"]; }
        set { base["oldChar"] = value; }
    }


    [ConfigurationProperty("newChar", DefaultValue = "", IsKey = false, IsRequired = true)]
    public string newChar
    {
        get { return (string)base["newChar"]; }
        set { base["newChar"] = value; }
    }

}