First Try to Upload-file Async

Step/Controllers/WebApi/NcFileController.cs

@@ -8,6 +8,7 @@ using System.Net;
 using System.Net.Http;
 using System.Net.Http.Headers;
 using System.Text;
+using System.Threading;
 using System.Threading.Tasks;
 using System.Web.Http;
 using static CMS_CORE_Library.DataStructures;
@@ -79,8 +80,9 @@ namespace Step.Controllers.WebApi
             List<string> files = new List<string>();
 
             // Read all contents of multipart message into CustomMultipartFormDataStreamProvider.
-            var result = await Request.Content.ReadAsMultipartAsync(provider);
-
+            var result = await Request.Content.ReadAsMultipartAsync(provider);
+
+          Thread.Sleep(5000);
             // Send OK Response along with saved file names to the client.
             return Ok();
         }