diff --git a/Examples/JoinHiderBot/JoinHiderBot.csproj b/Examples/JoinHiderBot/JoinHiderBot.csproj
new file mode 100644
index 0000000..f45b9ca
--- /dev/null
+++ b/Examples/JoinHiderBot/JoinHiderBot.csproj
@@ -0,0 +1,12 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="TelegramBotBase" Version="3.0.0" />
+  </ItemGroup>
+
+</Project>
diff --git a/Examples/JoinHiderBot/Program.cs b/Examples/JoinHiderBot/Program.cs
new file mode 100644
index 0000000..e3c2ec5
--- /dev/null
+++ b/Examples/JoinHiderBot/Program.cs
@@ -0,0 +1,19 @@
+using System;
+
+namespace JoinHiderBot
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+
+            String apiKey = "";
+
+            var bot = new TelegramBotBase.BotBase<forms.Start>(apiKey);
+
+            bot.Start();
+
+            Console.ReadLine();
+        }
+    }
+}
diff --git a/Examples/JoinHiderBot/forms/GroupManageForm.cs b/Examples/JoinHiderBot/forms/GroupManageForm.cs
new file mode 100644
index 0000000..3e6cc2a
--- /dev/null
+++ b/Examples/JoinHiderBot/forms/GroupManageForm.cs
@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading.Tasks;
+using TelegramBotBase.Args;
+using TelegramBotBase.Form;
+
+namespace JoinHiderBot.forms
+{
+    public class GroupManageForm : GroupForm
+    {
+
+        public override async Task OnMemberChanges(MemberChangeEventArgs e)
+        {
+            if (e.Type != Telegram.Bot.Types.Enums.MessageType.ChatMembersAdded && e.Type != Telegram.Bot.Types.Enums.MessageType.ChatMemberLeft)
+                return;
+
+
+            var m = e.Result.Message;
+
+            await this.Device.DeleteMessage(m);
+        }
+
+    }
+}
diff --git a/Examples/JoinHiderBot/forms/Start.cs b/Examples/JoinHiderBot/forms/Start.cs
new file mode 100644
index 0000000..aef4c7d
--- /dev/null
+++ b/Examples/JoinHiderBot/forms/Start.cs
@@ -0,0 +1,29 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading.Tasks;
+using TelegramBotBase.Base;
+using TelegramBotBase.Form;
+
+namespace JoinHiderBot.forms
+{
+    public class Start :  SplitterForm
+    {
+        public override async Task<bool> Open(MessageResult e)
+        {
+            await this.Device.Send("This bot works only in groups.");
+
+            return true;
+        }
+
+        public override async Task<bool> OpenGroup(MessageResult e)
+        {
+            var gmf = new GroupManageForm();
+
+            await this.NavigateTo(gmf);
+
+            return true;
+        }
+
+    }
+}
diff --git a/TelegramBotFramework.sln b/TelegramBotFramework.sln
index c4f75b1..f14d7d4 100644
--- a/TelegramBotFramework.sln
+++ b/TelegramBotFramework.sln
@@ -16,6 +16,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Examples", "Examples", "{BF
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SystemCommandsBot", "Examples\SystemCommandsBot\SystemCommandsBot.csproj", "{FC484952-3060-4F87-9809-4CD66D6961C0}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "JoinHiderBot", "Examples\JoinHiderBot\JoinHiderBot.csproj", "{E804B9E5-7ACC-49D3-9253-806766C1D9A5}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -34,12 +36,17 @@ Global
 		{FC484952-3060-4F87-9809-4CD66D6961C0}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{FC484952-3060-4F87-9809-4CD66D6961C0}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{FC484952-3060-4F87-9809-4CD66D6961C0}.Release|Any CPU.Build.0 = Release|Any CPU
+		{E804B9E5-7ACC-49D3-9253-806766C1D9A5}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E804B9E5-7ACC-49D3-9253-806766C1D9A5}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E804B9E5-7ACC-49D3-9253-806766C1D9A5}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E804B9E5-7ACC-49D3-9253-806766C1D9A5}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
 	GlobalSection(NestedProjects) = preSolution
 		{FC484952-3060-4F87-9809-4CD66D6961C0} = {BFA71E3F-31C0-4FC1-A320-4DCF704768C5}
+		{E804B9E5-7ACC-49D3-9253-806766C1D9A5} = {BFA71E3F-31C0-4FC1-A320-4DCF704768C5}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {59CB40E1-9FA7-4867-A56F-4F418286F057}