title: Send Multiple Request To Telegram viaTlsharp
body: <p>I have written code to add multiple number to my contact list:</p>
  
  <pre><code>     foreach (var item in collection)
              {
  
    var contacts = new TLVector&lt;TLInputPhoneContact&gt;();
                  contacts.lists.Add(new TLInputPhoneContact { first_name = "", last_name = item, phone =  item });
  
  
                  //Create request 
                  var req = new TLRequestImportContacts()
                  {
                      contacts = contacts
                  };
                  await client.SendRequestAsync&lt;TLImportedContacts&gt;(req);
                  Thread.Sleep(6000);
              }
  </code></pre>
  
  <p>i have added sleep for adding number to my contact list because telegram api doesnt let me to send multiple request and give me flood error . is there any method to add 50 contact at once ?</p>