public async Task UploadAndSendMedia()
{
var store = new FileSessionStore();
var client = new TelegramClient(store, "session");
await client.Connect();
Assert.IsTrue(client.IsUserAuthorized());
var res = await client.ImportContactByPhoneNumber(NumberToSendMessage);
Assert.IsNotNull(res);
const string testFile = "TEST";
var file = File.ReadAllBytes("../../data/cat.jpg");
var mediaFile = await client.UploadFile("test_file.jpg", file);
Assert.IsNotNull(mediaFile);
var state = await client.SendMediaMessage(res.Value, mediaFile);
Assert.IsTrue(state);
}