fix: remove obsolete properties & fix NRE

TelegramBotBase/Base/MessageResult.cs

@@ -33,7 +33,7 @@ public class MessageResult : ResultBase
     /// <summary>
     ///     The message id
     /// </summary>
-    public new int MessageId =>
+    public override int MessageId =>
         UpdateData?.Message?.MessageId
         ?? Message?.MessageId
         ?? UpdateData?.CallbackQuery?.Message?.MessageId
@@ -45,6 +45,13 @@ public class MessageResult : ResultBase
 
     public MessageType MessageType => Message?.Type ?? MessageType.Unknown;
 
+    public override Message Message =>
+        UpdateData?.Message
+        ?? UpdateData?.EditedMessage
+        ?? UpdateData?.ChannelPost
+        ?? UpdateData?.EditedChannelPost
+        ?? UpdateData?.CallbackQuery?.Message;
+
     /// <summary>
     ///     Is this an action ? (i.e. button click)
     /// </summary>

TelegramBotBase/Base/ResultBase.cs

@@ -12,7 +12,7 @@ public class ResultBase : EventArgs
 
     public virtual long DeviceId { get; set; }
 
-    public int MessageId => Message.MessageId;
+    public virtual int MessageId => Message.MessageId;
 
     public virtual Message Message { get; set; }
 
@@ -42,4 +42,4 @@ public class ResultBase : EventArgs
         {
         }
     }
-}
+}