Catching all exceptions in Main to ensure the log is properly flushed before exiting the process.

Author: Cristian Pop

e2e/stress/IoTClientPerf/Program.cs

@@ -248,13 +248,16 @@ public static int Main(string[] args)
             {
                 ret = runner.RunTestAsync().GetAwaiter().GetResult();
             }
-            finally
+            catch (Exception ex)
             {
-                Console.Write("Writing output . . . ");
-                resultWriter.FlushAsync().GetAwaiter().GetResult();
-                Console.WriteLine("OK");
+                Console.WriteLine(ex);
+                ret = -1;
             }
 
+            Console.Write("Writing output . . . ");
+            resultWriter.FlushAsync().GetAwaiter().GetResult();
+            Console.WriteLine("OK");
+
             if (ret == 0)
             {
                 Console.WriteLine("Test PASSED.");