/// <summary>
/// Aktuális árfolyam lekérdezése
/// </summary>
public static async Task <decimal> GetCurrentExchangeRate(string currency)
{
MNBArfolyamServiceSoapClient client = new MNBArfolyamServiceSoapClient();
await client.OpenAsync();
GetCurrentExchangeRatesResponse response = await client.GetCurrentExchangeRatesAsync(new GetCurrentExchangeRatesRequestBody());
await client.CloseAsync();
return(GetCurrentExchangeRateFromString(currency, response.GetCurrentExchangeRatesResponse1.GetCurrentExchangeRatesResult));
}