public async Task<bool> SendMessage(string number, string body)
{
    var from = _config["SMSSenderSettings:FromNumber"];
        var username = _config["SMSSenderSettings:PanelUserName"];
        var password = _config["SMSSenderSettings:PanelPassword"];

        using (var client = new HttpClient())
        {
            try
            {
                var response = await client.GetAsync($"{BaseUrl}/send.php?method=sendsms&format=json&from={from}" +
                    $"&to={number}&text={body}&type=0&username={username}&password={password}");
                response.EnsureSuccessStatusCode(); // Throw exception if call is not successful

                response.Content.ReadAsStringAsync();
                return true;
            }
            catch (HttpRequestException)
            {
                return false;
            }
        }
}

public async Task SendMessage(string number, string body)
{
    var from = _config["SMSSenderSettings:FromNumber"];
    var username = _config["SMSSenderSettings:PanelUserName"];
    var password = _config["SMSSenderSettings:PanelPassword"];

    using (var client = new HttpClient())
    {
        try
        {
            var response = await client.GetAsync($"{BaseUrl}/send.php?method=sendsms&format=json&from={from}" +
                $"&to={number}&text={body}&type=0&username={username}&password={password}");
            response.EnsureSuccessStatusCode(); // Throw exception if call is not successful

            await response.Content.ReadAsStringAsync();
        }
        catch (HttpRequestException)
        {

        }
    }
}

await SendMessage().ConfigureAwait(false);

var t = response.Content.ReadAsStringAsync();

public async Task<bool> SendMessage(string number, string body)
{
    var from = _config["SMSSenderSettings:FromNumber"];
    var username = _config["SMSSenderSettings:PanelUserName"];
    var password = _config["SMSSenderSettings:PanelPassword"];

    using (var client = new HttpClient())
    {
        var response = await client.GetAsync($"{BaseUrl}/send.php?method=sendsms&format=json&from={from}" +
            $"&to={number}&text={body}&type=0&username={username}&password={password}");
        return response.IsSuccessStatusCode();
    }
}