How to convert a String to a Hex Byte Array? [duplicate]

Question

Possible Duplicate:
How do you convert Byte Array to Hexadecimal String, and vice versa, in C#?

For testing my encryption algorithm I have being provided keys, plain text and their resulting cipher text.

The keys and plaintext are in strings

How do i convert it to a hex byte array??

Something like this : E8E9EAEBEDEEEFF0F2F3F4F5F7F8F9FA

To something like this :

byte[] key = new byte[16] { 0xE8, 0xE9, 0xEA, 0xEB, 0xED, 0xEE, 0xEF, 0xF0, 0xF2, 0xF3, 0xF4, 0xF5, 0xF7, 0xF8, 0xF9, 0xFA} ;

Thanx in advance :)

Answer 1

Do you need this?

static class HexStringConverter
{
    public static byte[] ToByteArray(String HexString)
    {
        int NumberChars = HexString.Length;
        byte[] bytes = new byte[NumberChars / 2];
        for (int i = 0; i < NumberChars; i += 2)
        {
            bytes[i / 2] = Convert.ToByte(HexString.Substring(i, 2), 16);
        }
        return bytes;
    }
}

Hope it helps.