# System.Net.Http

``` diff
 namespace System.Net.Http {
     public class MultipartContent : HttpContent, IEnumerable, IEnumerable<HttpContent> {
+        protected override Task<Stream> CreateContentReadStreamAsync();
     }
     public sealed class ReadOnlyMemoryContent : HttpContent {
+        protected override Task<Stream> CreateContentReadStreamAsync();
     }
 }
```

