diff --git a/TelegramBotBase/Base/FormBase.cs b/TelegramBotBase/Base/FormBase.cs
index 5535164..014ab72 100644
--- a/TelegramBotBase/Base/FormBase.cs
+++ b/TelegramBotBase/Base/FormBase.cs
@@ -297,6 +297,53 @@ namespace TelegramBotBase.Form
             await newForm.OnOpened(new EventArgs());
         }
 
+        /// <summary>
+        /// Opens this form modal, but don't closes the original ones
+        /// </summary>
+        /// <param name="newForm"></param>
+        /// <returns></returns>
+        public async Task OpenModal(ModalDialog newForm, params object[] args)
+        {
+            DeviceSession ds = this.Device;
+            if (ds == null)
+                return;
+
+            var parentForm = this;
+
+            ds.FormSwitched = true;
+
+            ds.PreviousForm = ds.ActiveForm;
+
+            ds.ActiveForm = newForm;
+            newForm.Client = parentForm.Client;
+            newForm.Device = ds;
+
+            newForm.Closed += async (s, en) =>
+            {
+                await CloseModal(newForm, parentForm);
+            };
+
+            await newForm.OnInit(new InitEventArgs(args));
+
+            await newForm.OnOpened(new EventArgs());
+        }
+
+        public async Task CloseModal(ModalDialog modalForm, FormBase oldForm)
+        {
+            DeviceSession ds = this.Device;
+            if (ds == null)
+                return;
+
+            if (modalForm == null)
+                throw new Exception("No modal form");
+
+            ds.FormSwitched = true;
+
+            ds.PreviousForm = ds.ActiveForm;
+
+            ds.ActiveForm = oldForm;
+        }
+
         /// <summary>
         /// Adds a control to the formular and sets its ID and Device.
         /// </summary>
diff --git a/TelegramBotBase/Form/ConfirmDialog.cs b/TelegramBotBase/Form/ConfirmDialog.cs
index 9081ced..acdb25e 100644
--- a/TelegramBotBase/Form/ConfirmDialog.cs
+++ b/TelegramBotBase/Form/ConfirmDialog.cs
@@ -8,7 +8,7 @@ using TelegramBotBase.Base;
 
 namespace TelegramBotBase.Form
 {
-    public class ConfirmDialog : FormBase
+    public class ConfirmDialog : ModalDialog
     {
         public String Message { get; set; }
 
diff --git a/TelegramBotBase/Form/ModalDialog.cs b/TelegramBotBase/Form/ModalDialog.cs
new file mode 100644
index 0000000..785ebd2
--- /dev/null
+++ b/TelegramBotBase/Form/ModalDialog.cs
@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace TelegramBotBase.Form
+{
+    public class ModalDialog : FormBase
+    {
+
+
+        /// <summary>
+        /// This is a modal only function and does everything to close this form.
+        /// </summary>
+        public async Task CloseForm()
+        {
+
+            await this.CloseControls();
+
+            await this.OnClosed(new EventArgs());
+
+        }
+    }
+}
diff --git a/TelegramBotBase/Form/PromptDialog.cs b/TelegramBotBase/Form/PromptDialog.cs
index bb18b4c..d624dd0 100644
--- a/TelegramBotBase/Form/PromptDialog.cs
+++ b/TelegramBotBase/Form/PromptDialog.cs
@@ -8,7 +8,7 @@ using TelegramBotBase.Base;
 
 namespace TelegramBotBase.Form
 {
-    public class PromptDialog : FormBase
+    public class PromptDialog : ModalDialog
     {
         public String Message { get; set; }
 
@@ -53,6 +53,8 @@ namespace TelegramBotBase.Form
 
 
             OnCompleted(new EventArgs());
+
+            await this.CloseForm();
         }
 
 
diff --git a/TelegramBotBaseTest/Tests/TestForm2.cs b/TelegramBotBaseTest/Tests/TestForm2.cs
index 2c07fbb..741b0c3 100644
--- a/TelegramBotBaseTest/Tests/TestForm2.cs
+++ b/TelegramBotBaseTest/Tests/TestForm2.cs
@@ -31,7 +31,7 @@ namespace TelegramBaseTest.Tests
         {
             await this.Device.Send("Ciao from Form 2");
         }
-
+        
 
 
 
@@ -84,12 +84,9 @@ namespace TelegramBaseTest.Tests
                 pd.Completed += async (s, en) =>
                 {
                     await this.Device.Send("Hello " + pd.Value);
-
-                    var tf = new TestForm2();
-                    await pd.NavigateTo(tf);
                 };
 
-                await this.NavigateTo(pd);
+                await this.OpenModal(pd);
             }