System.Security.Cryptography.IncrementalHash.AppendData C# (CSharp) Method

        public void AppendData(byte[] data)
        {
            if (data == null)
                throw new ArgumentNullException(nameof(data));

            AppendData(data, 0, data.Length);
        }

        private static void Extract(HashAlgorithmName hashAlgorithmName, int hashLength, ReadOnlySpan <byte> ikm, ReadOnlySpan <byte> salt, Span <byte> prk)
        {
            Debug.Assert(HashLength(hashAlgorithmName) == hashLength);

            using (IncrementalHash hmac = IncrementalHash.CreateHMAC(hashAlgorithmName, salt))
            {
                hmac.AppendData(ikm);
                GetHashAndReset(hmac, prk);
            }
        }