// 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;
 
namespace Roslyn.Utilities
{
    internal partial class SpecializedCollections
    {
        private partial class Empty
        {
            internal class Enumerator : IEnumerator
            {
                public static readonly IEnumerator Instance = new Enumerator();
 
                protected Enumerator()
                {
                }
 
                public object? Current => throw new InvalidOperationException();
 
                public bool MoveNext()
                {
                    return false;
                }
 
                public void Reset()
                {
                    throw new InvalidOperationException();
                }
            }
        }
    }
}