Adding C# script reference to System.Net.Http.Formatting

Author: fabiocav

src/WebJobs.Script/Description/CSharp/FunctionMetadataResolver.cs

@@ -41,7 +41,8 @@ public sealed class FunctionMetadataResolver : MetadataReferenceResolver
                 typeof(IAsyncCollector<>).Assembly.Location, /*Microsoft.Azure.WebJobs*/
                 typeof(JobHost).Assembly.Location, /*Microsoft.Azure.WebJobs.Host*/
                 typeof(CoreJobHostConfigurationExtensions).Assembly.Location, /*Microsoft.Azure.WebJobs.Extensions*/
-                typeof(System.Web.Http.ApiController).Assembly.Location /*System.Web.Http*/
+                typeof(System.Web.Http.ApiController).Assembly.Location, /*System.Web.Http*/
+                typeof(System.Net.Http.HttpClientExtensions).Assembly.Location /*System.Net.Http.Formatting*/
             };
 
         private static readonly Assembly[] SharedAssemblies =