Updated feature management package versions.

Removed unnecessary using.
Fixed IsEnabled API call.

Author: jimmyca15

articles/azure-app-configuration/quickstart-feature-flag-aspnet-core.md

@@ -82,8 +82,8 @@ Add the [Secret Manager tool](https://docs.microsoft.com/aspnet/core/security/ap
 1. Add reference to the `Microsoft.Azure.AppConfiguration.AspNetCore` and the `Microsoft.FeatureManagement.AspNetCore` NuGet packages by running the following commands:
 
     ```
-    dotnet add package Microsoft.Azure.AppConfiguration.AspNetCore --version {tbd}
-    dotnet add package Microsoft.FeatureManagement.AspNetCore --version {tbd}
+    dotnet add package Microsoft.Azure.AppConfiguration.AspNetCore --version 3.0.0-preview-010560002-1165
+    dotnet add package Microsoft.FeatureManagement.AspNetCore --version 2.0.0-preview-010610001-1263
     ```
 
 1. Run the following command to restore packages for your project:
@@ -106,12 +106,6 @@ Add the [Secret Manager tool](https://docs.microsoft.com/aspnet/core/security/ap
 
     You can access this secret with the App Configuration API. A colon (:) works in the configuration name with the App Configuration API on all supported platforms. See [Configuration by environment](https://docs.microsoft.com/aspnet/core/fundamentals/configuration).
 
-1. Open *Program.cs*, and add a reference to the .NET Core App Configuration provider:
-
-    ```csharp
-    using Microsoft.Extensions.Configuration.AzureAppConfiguration;
-    ```
-
 1. Update the `CreateWebHostBuilder` method to use App Configuration by calling the `config.AddAzureAppConfiguration()` method.
 
     > [!IMPORTANT]

articles/azure-app-configuration/use-feature-flags-dotnet-core.md

@@ -175,7 +175,7 @@ The basic pattern of feature management is to first check if a feature flag is s
 ```csharp
 IFeatureManager featureManager;
 ...
-if (await featureManager.IsEnabled(nameof(MyFeatureFlags.FeatureA)))
+if (await featureManager.IsEnabledAsync(nameof(MyFeatureFlags.FeatureA)))
 {
     // Run the following code
 }