# Microsoft.AspNetCore.Http

``` diff
 namespace Microsoft.AspNetCore.Http {
     public abstract class HttpResponse {
-        public abstract string ContentType { get; set; }
+        public abstract string? ContentType { get; set; }
     }
     public class StreamResponseBodyFeature : IHttpResponseBodyFeature {
-        public StreamResponseBodyFeature(Stream stream, IHttpResponseBodyFeature priorFeature);
+        public StreamResponseBodyFeature(Stream stream, IHttpResponseBodyFeature? priorFeature);
     }
 }
```

