private void SetAuthHeader()
{
byte[] credentialBuffer = new UTF8Encoding().GetBytes(
string.Format("{0}:{1}", this.userLogin, this.password));
string auth = "Basic " + Convert.ToBase64String(credentialBuffer);
//nagłówek autoryzacja - zakodowane w base64
blipHttpClientAsync.DefaultHeaders.Remove("Authorization");
blipHttpClientAsync.DefaultHeaders.Add("Authorization", auth);
blipHttpClientSync.DefaultHeaders.Remove("Authorization");
blipHttpClientSync.DefaultHeaders.Add("Authorization", auth);
}