title: Get a phone number in a telegram through BotFramework
body: <p>I want to get a phone number in a telegram through BotFramework. About it is written here <a href="https://docs.microsoft.com/ru-ru/azure/bot-service/dotnet/bot-builder-dotnet-channeldata?view=azure-bot-service-3.0#create-a-telegram" rel="nofollow noreferrer">https://docs.microsoft.com/ru-ru/azure/bot-service/dotnet/bot-builder-dotnet-channeldata?view=azure-bot-service-3.0#create-a-telegram</a> - message 
  But I can not understand how to write it in code. Interested in the sendContact method. I would be grateful for the help.</p>