Use async main

Author: Cecil Phillip

articles/azure-app-configuration/quickstart-feature-flag-dotnet.md

@@ -64,13 +64,8 @@ The .NET Feature Management libraries extend the framework with comprehensive fe
 1. Update the `Main` method to connect to App Configuration, specifying the `UseFeatureFlags` option so that feature flags are retrieved. Then display a message if the `Beta` feature flag is enabled.
 
     ```csharp
-        public static void Main(string[] args)
-        {
-            AsyncMain().Wait();
-        }
-
-        private static async Task AsyncMain()
-        {
+        public static async Task Main(string[] args)
+        {         
             IConfigurationRoot configuration = new ConfigurationBuilder()
                 .AddAzureAppConfiguration(options =>
                 {