Update AppLifecycleHelper.cs

Author: yaira2

src/Files.App/Helpers/Application/AppLifecycleHelper.cs

@@ -29,12 +29,16 @@ public static class AppLifecycleHelper
 		/// <summary>
 		/// Gets the value that provides application environment or branch name.
 		/// </summary>
-		public static AppEnvironment AppEnvironment { get; } =
-#if DEBUG
-		AppEnvironment.Dev;
-#else
-		AppEnvironment.cd_app_env_placeholder;
-#endif
+		public static AppEnvironment AppEnvironment
+		{
+			get
+			{
+				if (Enum.TryParse("cd_app_env_placeholder", true, out AppEnvironment appEnvironment))
+					return appEnvironment;
+				else
+					return AppEnvironment.Dev;
+			}
+		}
 
 		/// <summary>
 		/// Gets application package version.