Updated key/endpoint

Endpoints are not region-based anymore, but rather custom domain -based. Although regional endpoints will still work. Also, the authentication information is moving to a standard of getting it from environment variables.

Author: wiazur

dotnet/Search/BingImageSearchInsightsTutorial.cs

@@ -7,11 +7,11 @@ namespace ConsoleAppPost
 {
     class Program
     {
-        // Replace the accessKey string value with your valid access key.
-        const string accessKey = "enter key here";
+        // Add your Azure Bing Search v7 subscription key to your environment variables
+        const string accessKey = Environment.GetEnvironmentVariable("BING_SEARCH_V7_SUBSCRIPTION_KEY");
 
-        // The endpoint URI.  
-        const string uriBase = "https://api.cognitive.microsoft.com/bing/v7.0/images/details";
+        // Add your Azure Bing Search v7 endpoint to your environment variables  
+        const string uriBase = Environment.GetEnvironmentVariable("BING_SEARCH_V7_ENDPOINT") + "/bing/v7.0/images/details";
 
         // The image to upload. Replace with your file and path.
         const string imageFile = "your-image-file.jpg";
@@ -144,4 +144,4 @@ static string JsonPrettyPrint(string json)
             return sb.ToString().Trim();
         }
     }
-}
+}