XmlSchemaObjectCollection.cs

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using System.Collections;
 
namespace System.Xml.Schema;
 
public class XmlSchemaObjectCollection : CollectionBase
{
    private readonly XmlSchemaObject _parent;
 
    public virtual XmlSchemaObject this[int index]
    {
        get
        {
            return (XmlSchemaObject)base.List[index];
        }
        set
        {
            base.List[index] = value;
        }
    }
 
    public XmlSchemaObjectCollection()
    {
    }
 
    public XmlSchemaObjectCollection(XmlSchemaObject? parent)
    {
        _parent = parent;
    }
 
    public new XmlSchemaObjectEnumerator GetEnumerator()
    {
        return new XmlSchemaObjectEnumerator(base.InnerList.GetEnumerator());
    }
 
    public int Add(XmlSchemaObject item)
    {
        return base.List.Add(item);
    }
 
    public void Insert(int index, XmlSchemaObject item)
    {
        base.List.Insert(index, item);
    }
 
    public int IndexOf(XmlSchemaObject item)
    {
        return base.List.IndexOf(item);
    }
 
    public bool Contains(XmlSchemaObject item)
    {
        return base.List.Contains(item);
    }
 
    public void Remove(XmlSchemaObject item)
    {
        base.List.Remove(item);
    }
 
    public void CopyTo(XmlSchemaObject[] array, int index)
    {
        base.List.CopyTo(array, index);
    }
 
    protected override void OnInsert(int index, object? item)
    {
        if (_parent != null)
        {
            _parent.OnAdd(this, item);
        }
    }
 
    protected override void OnSet(int index, object? oldValue, object? newValue)
    {
        if (_parent != null)
        {
            _parent.OnRemove(this, oldValue);
            _parent.OnAdd(this, newValue);
        }
    }
 
    protected override void OnClear()
    {
        if (_parent != null)
        {
            _parent.OnClear(this);
        }
    }
 
    protected override void OnRemove(int index, object? item)
    {
        if (_parent != null)
        {
            _parent.OnRemove(this, item);
        }
    }
 
    internal XmlSchemaObjectCollection Clone()
    {
        XmlSchemaObjectCollection xmlSchemaObjectCollection = new XmlSchemaObjectCollection();
        xmlSchemaObjectCollection.Add(this);
        return xmlSchemaObjectCollection;
    }
 
    private void Add(XmlSchemaObjectCollection collToAdd)
    {
        base.InnerList.InsertRange(0, collToAdd);
    }
}