CentralMine.NET.Utils.HexStringToByteArray C# (CSharp) Method

        public static byte[] HexStringToByteArray(string hex)
        {
            if (hex.Length % 2 == 1)
                throw new Exception("The binary key cannot have an odd number of digits");

            byte[] arr = new byte[hex.Length >> 1];

            for (int i = 0; i < hex.Length >> 1; ++i)
            {
                arr[i] = (byte)((GetHexVal(hex[i << 1]) << 4) + (GetHexVal(hex[(i << 1) + 1])));
            }

            return arr;
        }

        public WorkBlock(JObject obj)
        {
            strMidstate = obj["midstate"].ToString();
            strData     = obj["data"].ToString();
            strHash1    = obj["hash1"].ToString();
            strTarget   = obj["target"].ToString();

            //strMidstate = "339a90bcf0bf58637daccc90a8ca591ee9d8c8c3c803014f3687b1961bf91947";
            //strData = "000000010000000000000000000000000000000000000000000000000000000000000000fdeda33bb2127b7a3e2cc77a618f7667c31bc87f32518a88aab89f3a4a5e1e4b495fab291d00ffff7c2bac1d000000800000000000000000000000000000000000000000000000000000000000000000000000000000000080020000";
            //strTarget = "0000000000000000000000000000000000000000000000000000ffff00000000";
            // 2,083,236,893

            //strData = "000000022a34cf18f3e954a376d84bfb9665b4f9602e7fc0a90a934b9aa31b1abf7b9d63ade27f84f9d067e70428d2e72d58405fdb42626fe166e0d245efaae46390dbd9532a27ed1c011b0d6bb20500000000800000000000000000000000000000000000000000000000000000000000000000000000000000000080020000";
            //strTarget = "000000000000000000000000000000000000000000000000000d1b0100000000";

            midstate = Utils.HexStringToByteArray(strMidstate);
            data     = Utils.HexStringToByteArray(strData);
            hash1    = Utils.HexStringToByteArray(strHash1);
            target   = Utils.HexStringToByteArray(strTarget);


            data64 = new byte[64];
            Buffer.BlockCopy(data, 64, data64, 0, 64);
            //Utils.ByteSwapIntegers(target);

            mHashMan = new HashManager();
        }