Empty Enumerable/Enumerator : IEnumerable « Collections Data Structure « C# / C Sharp

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C# / C Sharp » Collections Data Structure » IEnumerableScreenshots 
Empty Enumerable/Enumerator
 


//http://www.bouncycastle.org/
//MIT X11 License

using System;
using System.Collections;

namespace Org.BouncyCastle.Utilities.Collections
{
  public sealed class EmptyEnumerable
    : IEnumerable
  {
    public static readonly IEnumerable Instance = new EmptyEnumerable();

    private EmptyEnumerable()
    {
    }

    public IEnumerator GetEnumerator()
    {
      return EmptyEnumerator.Instance;
    }
  }

  public sealed class EmptyEnumerator
    : IEnumerator
  {
    public static readonly IEnumerator Instance = new EmptyEnumerator();

    private EmptyEnumerator()
    {
    }

    public bool MoveNext()
    {
      return false;
    }

    public void Reset()
    {
    }

    public object Current
    {
      get throw new InvalidOperationException("No elements")}
    }
  }
}

   
  
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