- adding OpenModal/CloseModal features to leave a form open and "just" show a prompt and get back

- added new "ModalDialog" class to present modal forms
- updating examples for prompt dialog to use the modal feature

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; }
 

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());
+
+        }
+    }
+}

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();
         }