File: System\Net\Mail\AlternateViewCollection.cs
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Project: src\src\libraries\System.Net.Mail\src\System.Net.Mail.csproj (System.Net.Mail)
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.Collections.ObjectModel;
 
namespace System.Net.Mail
{
    public sealed class AlternateViewCollection : Collection<AlternateView>, IDisposable
    {
        private bool _disposed;
 
        internal AlternateViewCollection()
        { }
 
        public void Dispose()
        {
            if (_disposed)
            {
                return;
            }
 
            foreach (AlternateView view in this)
            {
                view.Dispose();
            }
            Clear();
            _disposed = true;
        }
 
        protected override void RemoveItem(int index)
        {
            ObjectDisposedException.ThrowIf(_disposed, this);
 
            base.RemoveItem(index);
        }
 
        protected override void ClearItems()
        {
            ObjectDisposedException.ThrowIf(_disposed, this);
 
            base.ClearItems();
        }
 
 
        protected override void SetItem(int index, AlternateView item)
        {
            ObjectDisposedException.ThrowIf(_disposed, this);
            ArgumentNullException.ThrowIfNull(item);
            base.SetItem(index, item);
        }
 
        protected override void InsertItem(int index, AlternateView item)
        {
            ObjectDisposedException.ThrowIf(_disposed, this);
            ArgumentNullException.ThrowIfNull(item);
            base.InsertItem(index, item);
        }
    }
}