Adding EndsWith action and example for RTL community

Experiments/ExternalActionManager/DemoBot/Forms/HiddenForm_EndsWith.cs

@@ -0,0 +1,52 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.WebSockets;
+using System.Text;
+using System.Threading.Tasks;
+using TelegramBotBase.Base;
+using TelegramBotBase.Form;
+
+namespace DemoBot.Forms
+{
+    public class HiddenForm_EndsWith : AutoCleanForm
+    {
+        public String value {  get; set; }
+
+        public HiddenForm_EndsWith() {
+
+            DeleteMode = TelegramBotBase.Enums.EDeleteMode.OnLeavingForm;
+            DeleteSide = TelegramBotBase.Enums.EDeleteSide.Both;
+        }
+
+        public override async Task Action(MessageResult message)
+        {
+            if (message.RawData != "start")
+            {
+                return;
+            }
+
+            await message.ConfirmAction("Lets go");
+
+            message.Handled = true;
+
+            var st = new StartForm();
+
+            await NavigateTo(st);
+        }
+
+        public override async Task Render(MessageResult message)
+        {
+
+            var bf = new ButtonForm();
+
+            bf.AddButtonRow("Goto Start", "start");
+
+            value = value.Replace("_", "\\_");
+
+            await Device.Send($"Welcome to Hidden ends with form\n\nThe given value is {value}", bf);
+
+        }
+
+    }
+}