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public static string ByteToHex(byte[] b)
{
string HexChars = "0123456789abcdef";
StringBuilder sb = new StringBuilder(32);
for (int i = 0; i < b.Length; i++)
{
sb.Append(HexChars[b[i] / 16]);
sb.Append(HexChars[b[i] % 16]);
}
return sb.ToString();
}