Убраны старые api

Demo/Pages/FileSendPage.cs

@@ -8,7 +8,7 @@ namespace Demo.Pages;
 [Route("FileSend")]
 public sealed class FileSendPage : SingletonPage
 {
-    public override Task OnEnter(PageContext ctx, CancellationToken ct)
+    public override async Task OnEnter(PageContext ctx, CancellationToken ct)
     {
         var content = "Hello from BotPages! This file is generated on the fly.";
         var stream = new MemoryStream(System.Text.Encoding.UTF8.GetBytes(content));
@@ -23,9 +23,11 @@ public sealed class FileSendPage : SingletonPage
             GetStreamAsync = _ => Task.FromResult<Stream>(stream)
         };
 
-        return new MessageBuilder(ctx)
+        await new MessageBuilder(ctx)
             .Text("Вот пример отправки нового файла 📎", MessageFormat.Markdown)
             .File(demoFile, "Демонстрационный файл")
             .SendAsync(ct);
+
+        await ctx.GoToHomeAsync(ct);
     }
 }