title: TLSharp Send message to a group
body: <pre><code>//get user dialogs
  var dialogs = await client.GetUserDialogsAsync() as TLDialogs;
  
  //find channel by title
  var chat = dialogs.Chats
                    .Where(c =&gt; c.GetType() == typeof(TLChat))
                    .Cast&lt;TLChat&gt;()
                    .FirstOrDefault(c =&gt; c.Title == "zgzxbhsrbhdrbh");
  
  //send message
  await client.SendMessageAsync(new TLInputPeerChannel() { ChannelId = chat.Id }, 
                                                           "OUR_MESSAGE");
  </code></pre>
  
  <p>I`m trying this code, but it returns me InvalidOperationException: CHANNEL_INVALID. Can someone help?</p>