........
TcpClient client = null;
..............
.............
        private async Task ConnServTCP()
        {            
            try
            {
                await client.ConnectAsync(server, port);
                StColor.Color = Color.Green;
                
            }
            catch
            {
                StColor.Color = Color.Red;
            }
        }

         private async Task GD()
        {            
            byte[] data;  
            if (client.Connected)
            {
                try
                {
                    NetworkStream v = client.GetStream();
                    data = new Byte[256];
                    Int32 bytes = await v.ReadAsync(data, 0, data.Length);
                    LRData.Text = System.Text.Encoding.UTF8.GetString(data, 0, bytes);
                   
                }
                catch
                {
                    LRData.Text = "Нет данных";
                }      
            }
            else
            {
                LRData.Text = "Сервер недоступен";
            }
        }