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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.Collections.Generic;
namespace Roslyn.Utilities
{
internal static partial class SpecializedCollections
{
private static partial class Empty
{
internal class Collection<T> : Enumerable<T>, ICollection<T>
{
public static readonly ICollection<T> Instance = new Collection<T>();
protected Collection()
{
}
public void Add(T item)
{
throw new NotSupportedException();
}
public void Clear()
{
throw new NotSupportedException();
}
public bool Contains(T item)
{
return false;
}
public void CopyTo(T[] array, int arrayIndex)
{
}
public int Count => 0;
public bool IsReadOnly => true;
public bool Remove(T item)
{
throw new NotSupportedException();
}
}
}
}
}
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