fix code snippet language tags

docs/extensibility/getting-service-information-from-the-settings-store.md

@@ -18,7 +18,7 @@ You can use the settings store to find all available services or to determine wh
 
 2. In *FindServicesCommand.cs*, add the following using directives:
 
-    ```vb
+    ```csharp
     using System.Collections.Generic;
     using Microsoft.VisualStudio.Settings;
     using Microsoft.VisualStudio.Shell.Settings;
@@ -27,7 +27,7 @@ You can use the settings store to find all available services or to determine wh
 
 3. Get the configuration settings store, then find the subcollection named Services. This collection includes all the available services. In the `MenuItemCommand` method, remove the existing code and replace it with the following:
 
-    ```
+    ```csharp
     private void MenuItemCallback(object sender, EventArgs e)
     {
         SettingsManager settingsManager = new ShellSettingsManager(ServiceProvider);
@@ -57,7 +57,7 @@ You can use the settings store to find all available services or to determine wh
 
 1. In the MenuItemCallback of the project you created in the previous procedure, search the configuration settings store for the `Services` collection that has the subcollection named by the GUID of the service. In this case we will look for the Help service.
 
-    ```
+    ```csharp
     private void MenuItemCallback(object sender, EventArgs e)
     {
         SettingsManager settingsManager = new ShellSettingsManager(ServiceProvider);