Rewrite RabbitMQ ValuesController code to support netcoreapp2.1

src/DotNetNew.WebApi/CSharp/Controllers/ValuesController.cs

@@ -120,8 +120,9 @@ namespace Company.WebApplication1.Controllers
 #if (RabbitMqOption)
         public ActionResult<string> Get()
         {
-            using var connection = _factory.CreateConnection();
-            using var channel = connection.CreateModel();
+            using (var connection = _factory.CreateConnection())
+            using (var channel = connection.CreateModel())
+            {
                 // the queue
                 channel.QueueDeclare(
                     queue: QueueName,
@@ -152,6 +153,7 @@ namespace Company.WebApplication1.Controllers
                         body: body);
                     Thread.Sleep(1000);
                 }
+            }
 
             return "Wrote 5 message to the info log. Have a look!";
 #elif (RedisOption)

test/DotNetNew.SteeltoeWebApi.Test/Options/RabbitMqOptionTest.cs

@@ -58,8 +58,9 @@ public ValuesController(ILogger<ValuesController> logger, [FromServices] Connect
 [HttpGet]
 public ActionResult<string> Get()
 {
-    using var connection = _factory.CreateConnection();
-    using var channel = connection.CreateModel();
+    using (var connection = _factory.CreateConnection())
+    using (var channel = connection.CreateModel())
+    {
         // the queue
         channel.QueueDeclare(
             queue: QueueName,
@@ -90,6 +91,7 @@ public ActionResult<string> Get()
                 body: body);
             Thread.Sleep(1000);
         }
+    }
     return ""Wrote 5 message to the info log. Have a look!"";
 ");
         }