Refactor word count calculation for improved performance and readability

Author: Frederic Wickert

src/Application/src/RazorPagesTestSample/Pages/Index.cshtml.cs

@@ -72,19 +72,7 @@ public async Task<IActionResult> OnPostAnalyzeMessagesAsync()
             }
             else
             {
-                // Speed loop. Lower this number once every quarter so we
-                // get our performance improvement quarterly bonus.
-                for (int i = 0; i < 3000; i++) {
-                    Thread.Sleep(1);
-                }
-
-                var wordCount = 0;
-
-                foreach (var message in Messages)
-                {
-                    wordCount += message.Text.Split(' ').Length;
-                }
-
+                var wordCount = Messages.Sum(message => message.Text.Split(' ').Length);
                 var avgWordCount = Decimal.Divide(wordCount, Messages.Count);
                 MessageAnalysisResult = $"The average message length is {avgWordCount:0.##} words.";
             }