So in the old days I used to use System.Security.Cryptography which is not available

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Asked: June 18, 20262026-06-18T17:23:18+00:00 2026-06-18T17:23:18+00:00

So in the old days I used to use System.Security.Cryptography which is not available

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So in the old days I used to use System.Security.Cryptography which is not available in windows 8. what i found in windows 8 was windows.security
but i didn’t find any examples on how to use Sha256 with a key.
This is the old code that I used with System.Security.Cryptography

        string appID = "appid";
        string key = "password";
        var hmacsha256 = new HMACSHA256(Encoding.Default.GetBytes(key));
        hmacsha256.ComputeHash(Encoding.Default.GetBytes(appID));
        string k = "";
        foreach (byte test in hmacsha256.Hash)
        {
            k += test.ToString("X2");
        }