Use the new HttpContext.Features API.

Author: Tratcher

src/Microsoft.AspNet.StaticFiles/SendFileMiddleware.cs

@@ -38,9 +38,9 @@ public SendFileMiddleware([NotNull] RequestDelegate next, [NotNull] ILoggerFacto
         public Task Invoke(HttpContext context)
         {
             // Check if there is a SendFile feature already present
-            if (context.GetFeature<IHttpSendFileFeature>() == null)
+            if (context.Features.Get<IHttpSendFileFeature>() == null)
             {
-                context.SetFeature<IHttpSendFileFeature>(new SendFileWrapper(context.Response.Body, _logger));
+                context.Features.Set<IHttpSendFileFeature>(new SendFileWrapper(context.Response.Body, _logger));
             }
 
             return _next(context);

src/Microsoft.AspNet.StaticFiles/StaticFileContext.cs

@@ -324,7 +324,7 @@ public async Task SendAsync()
             ApplyResponseHeaders(Constants.Status200Ok);
 
             string physicalPath = _fileInfo.PhysicalPath;
-            var sendFile = _context.GetFeature<IHttpSendFileFeature>();
+            var sendFile = _context.Features.Get<IHttpSendFileFeature>();
             if (sendFile != null && !string.IsNullOrEmpty(physicalPath))
             {
                 await sendFile.SendFileAsync(physicalPath, 0, _length, _context.RequestAborted);
@@ -371,7 +371,7 @@ internal async Task SendRangeAsync()
             ApplyResponseHeaders(Constants.Status206PartialContent);
 
             string physicalPath = _fileInfo.PhysicalPath;
-            var sendFile = _context.GetFeature<IHttpSendFileFeature>();
+            var sendFile = _context.Features.Get<IHttpSendFileFeature>();
             if (sendFile != null && !string.IsNullOrEmpty(physicalPath))
             {
                 if (_logger.IsEnabled(LogLevel.Verbose))