Merge pull request #106768 from MarkHeff/csharptutorial-updates

Add ExitProgram to C# Tutorial

Author: PRMerger14

articles/search/cognitive-search-tutorial-blob-dotnet.md

@@ -182,7 +182,7 @@ namespace EnrichwithAI
 
 ### Create a client
 
-Create an instance of the `SearchServiceClient` class under Main.
+Create an instance of the `SearchServiceClient` class under `Main`.
 
 ```csharp
 public static void Main(string[] args)
@@ -210,6 +210,22 @@ private static SearchServiceClient CreateSearchServiceClient(IConfigurationRoot
 > The `SearchServiceClient` class manages connections to your search service. In order to avoid opening too many connections, you should try to share a single instance of `SearchServiceClient` in your application if possible. Its methods are thread-safe to enable such sharing.
 > 
 
+### Add function to exit the program during failure
+
+This tutorial is meant to help you understand each step of the indexing pipeline. If there is a critical issue that prevents the program from creating the data source, skillset, index, or indexer the program will output the error message and exit so that the issue can be understood and addressed.
+
+Add `ExitProgram` to `Main` to handle scenarios that require the program to exit.
+
+```csharp
+private static void ExitProgram(string message)
+{
+    Console.WriteLine("{0}", message);
+    Console.WriteLine("Press any key to exit the program...");
+    Console.ReadKey();
+    Environment.Exit(0);
+}
+```
+
 ## 3 - Create the pipeline
 
 In Azure Cognitive Search, AI processing occurs during indexing (or data ingestion). This part of the walkthrough creates four objects: data source, index definition, skillset, indexer. 
@@ -247,7 +263,7 @@ private static DataSource CreateOrUpdateDataSource(SearchServiceClient serviceCl
 
 For a successful request, the method will return the data source that was created. If there is a problem with the request, such as an invalid parameter, the method will throw an exception.
 
-Now add a line in Main to call the `CreateOrUpdateDataSource` function that you've just added.
+Now add a line in `Main` to call the `CreateOrUpdateDataSource` function that you've just added.
 
 ```csharp
 public static void Main(string[] args)
@@ -533,7 +549,7 @@ private static Skillset CreateOrUpdateDemoSkillSet(SearchServiceClient serviceCl
 }
 ```
 
-Add the following lines to Main.
+Add the following lines to `Main`.
 
 ```csharp
     // Create the skills
@@ -671,7 +687,7 @@ private static Index CreateDemoIndex(SearchServiceClient serviceClient)
 
 During testing you may find that you're attempting to create the index more than once. Because of this, check to see if the index that you're about to create already exists before attempting to create it.
 
-Add the following lines to Main.
+Add the following lines to `Main`.
 
 ```csharp
     // Create the index
@@ -775,7 +791,7 @@ private static Indexer CreateDemoIndexer(SearchServiceClient serviceClient, Data
     return indexer;
 }
 ```
-Add the following lines to Main.
+Add the following lines to `Main`.
 
 ```csharp
     // Create the indexer, map fields, and execute transformations
@@ -836,7 +852,7 @@ private static void CheckIndexerOverallStatus(SearchServiceClient serviceClient,
 
 Warnings are common with some source file and skill combinations and do not always indicate a problem. In this tutorial, the warnings are benign (for example, no text inputs from the JPEG files).
 
-Add the following lines to Main.
+Add the following lines to `Main`.
 
 ```csharp
     // Check indexer overall status
@@ -850,7 +866,7 @@ After indexing is finished, you can run queries that return the contents of indi
 
 As a verification step, query the index for all of the fields.
 
-Add the following lines to Main.
+Add the following lines to `Main`.
 
 ```csharp
 DocumentSearchResult<DemoIndex> results;
@@ -886,7 +902,7 @@ private static SearchIndexClient CreateSearchIndexClient(IConfigurationRoot conf
 }
 ```
 
-Add the following code to Main. The first try-catch returns the index definition, with the name, type, and attributes of each field. The second is a parameterized query, where `Select` specifies which fields to include in the results, for example `organizations`. A search string of `"*"` returns all contents of a single field.
+Add the following code to `Main`. The first try-catch returns the index definition, with the name, type, and attributes of each field. The second is a parameterized query, where `Select` specifies which fields to include in the results, for example `organizations`. A search string of `"*"` returns all contents of a single field.
 
 ```csharp
 //Verify content is returned after indexing is finished