IgnoreElements.cs 1.1 KB

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  1. // Licensed to the .NET Foundation under one or more agreements.
  2. // The .NET Foundation licenses this file to you under the Apache 2.0 License.
  3. // See the LICENSE file in the project root for more information.
  4. using System;
  5. using System.Collections.Generic;
  6. using System.Linq;
  7. using System.Threading.Tasks;
  8. namespace System.Linq
  9. {
  10. public static partial class EnumerableEx
  11. {
  12. /// <summary>
  13. /// Ignores all elements in the source sequence.
  14. /// </summary>
  15. /// <typeparam name="TSource">Source sequence element type.</typeparam>
  16. /// <param name="source">Source sequence.</param>
  17. /// <returns>Source sequence without its elements.</returns>
  18. public static IEnumerable<TSource> IgnoreElements<TSource>(this IEnumerable<TSource> source)
  19. {
  20. if (source == null)
  21. throw new ArgumentNullException(nameof(source));
  22. return source.IgnoreElements_();
  23. }
  24. private static IEnumerable<TSource> IgnoreElements_<TSource>(this IEnumerable<TSource> source)
  25. {
  26. foreach (var item in source)
  27. ;
  28. yield break;
  29. }
  30. }
  31. }