var url https trdata com isin2id php secret_code h2uWACMDGrzWjZZSreOZ

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var url = "https://trdata.com/isin2id.php?secret_code=h2uWACMDGrzWjZZSreOZyqj81YLzp1ug&isin=" + isin;
_webClient.OpenReadAsync(new Uri(url), UriKind.Absolute);