private async void ConvertTempToF()
        {
            TempConvertSoapClient f = new TempConvertSoapClient();
            var resultf             = await f.CelsiusToFahrenheitAsync(textbox.Text);

            await f.CloseAsync();

            tempf.Text = resultf;
        }
        private async void ConvertTempToC()
        {
            TempConvertSoapClient f = new TempConvertSoapClient();
            var resultc             = await f.FahrenheitToCelsiusAsync(textbox.Text);

            await f.CloseAsync();

            tempc.Text = resultc;
        }
        private async void TemperaturaZInternetu()
        {
            Windows.Web.Http.HttpClient hc = new Windows.Web.Http.HttpClient();
            var result = await hc.GetStringAsync(new Uri("http://ktostemperature.azurewebsites.net/external2.txt"));

            TempConvertSoapClient f = new TempConvertSoapClient();
            var resultf             = await f.CelsiusToFahrenheitAsync(result);

            await f.CloseAsync();

            temp.Text = $"{result} C, {resultf} F";
        }