/// <summary>Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.</summary>
 public void Dispose()
 {
     this.list = null;
 }
 /// <summary>Initializes a new instance of the <see cref="ListExEnumerator{T}"/> class.</summary>
 /// <param name="list">The bag.</param>
 public ListExEnumerator(ListEx <T> list)
 {
     this.list = list;
     this.Reset();
 }