netcore/System.Private.CoreLib/shared/System/Runtime/InteropServices/CollectionsMarshal.cs

   1 // Licensed to the .NET Foundation under one or more agreements.
   2 // The .NET Foundation licenses this file to you under the MIT license.
   3 // See the LICENSE file in the project root for more information.
   4
   5 using System.Collections.Generic;
   6
   7 namespace System.Runtime.InteropServices
   8 {
   9     /// <summary>
  10     /// An unsafe class that provides a set of methods to access the underlying data representations of collections.
  11     /// </summary>
  12     public static class CollectionsMarshal
  13     {
  14         /// <summary>
  15         /// Get a <see cref="Span{T}"/> view over a <see cref="List{T}"/>'s data.
  16         /// Items should not be added or removed from the <see cref="List{T}"/> while the <see cref="Span{T}"/> is in use.
  17         /// </summary>
  18         public static Span<T> AsSpan<T>(List<T>? list)
  19             => list is null ? default : new Span<T>(list._items, 0, list._size);
  20     }
  21 }