C#

Quote:

Caution
Because this is a static event, you must detach your event handlers when your application is disposed, or memory leaks will result.

{
  "valid": true,
  "messages": [
    "Cannot validate bank code length. No information available.",
    "Cannot get BIC. No information available."
  ],
  "iban": "BH00000000000000000000",
  "bankData": {
    "bankCode": "",
    "name": ""
  },
  "checkResults": {
    "bankCode": false
  }
}

HttpWebRequest request = (HttpWebRequest)WebRequest.Create("https://openiban.com/validate/" + txtIBAN.Text.Trim());
try
{
    WebResponse response = request.GetResponse();
    using (Stream responseStream = response.GetResponseStream())
    {
        StreamReader reader = new StreamReader(responseStream, Encoding.UTF8);

        string strsb = reader.ReadToEnd();

    }
}
catch (WebException ex)
{
    WebResponse errorResponse = ex.Response;
    using (Stream responseStream = errorResponse.GetResponseStream())
    {
        StreamReader reader = new StreamReader(responseStream, Encoding.GetEncoding("utf-8"));
        String errorText = reader.ReadToEnd();
        // log errorText
    }
    throw;
}