Updating variable and async call

updating variable with missing character ( '_') and adding GetAwaiter().GetResult() to the async call in the sync method

Author: eddynaka

articles/azure-monitor/app/worker-service.md

@@ -204,9 +204,9 @@ Following is the code for `TimedHostedService` where the background task logic r
             {
                 _logger.LogWarning("A sample warning message. By default, logs with severity Warning or higher is captured by Application Insights");
                 _logger.LogInformation("Calling bing.com");
-                var res = await httpClient.GetAsync("https://bing.com");
+                var res = httpClient.GetAsync("https://bing.com").GetAwaiter().GetResult();
                 _logger.LogInformation("Calling bing completed with status:" + res.StatusCode);
-                telemetryClient.TrackEvent("Bing call event completed");
+                _telemetryClient.TrackEvent("Bing call event completed");
             }
         }
     }