Machine Key for Load Balancing

In my project there is requirement to change the field length eg CompanyCode. Problem is with this field name there are many tables who not created the foriegn keys and this field is used in many procedures and functions. To find the text company code I found this simple code:

/// <summary>
/// Version arguments to MachineKey.Generate() method.
/// </summary>
public enum MachineKeyVersion
{
    /// <summary>
    /// .NET version 1.1.
    /// </summary>
    Net1,

    /// <summary>
    /// .NET version 2.0 and up.
    /// </summary>
    Net2,
}

public class MachineKey
{
    /// <summary>
    /// Generates the contents of a machineKey element suitable for use in
    /// an ASP.NET web.config file.
    /// </summary>
    /// <param name="version">Indicates if keys should be generated for
    /// ASP.NET 1.1 or 2.0 and later.</param>
    public static string Generate(MachineKeyVersion version)
    {
        // Generate keys
        string validationKey = GenerateKey(64);
        string decryptionKey;
        if (version == MachineKeyVersion.Net1)
            decryptionKey = GenerateKey(24);
        else
            decryptionKey = GenerateKey(32);

        // Construct <machineKey> tag
        StringBuilder builder = new StringBuilder();
        builder.Append("<machineKey");
        builder.AppendFormat(" validationKey=\"{0}\"", validationKey);
        builder.AppendFormat(" decryptionKey=\"{0}\"", decryptionKey);
        builder.Append(" validation=\"SHA1\"");
        if (version == MachineKeyVersion.Net2)
            builder.Append(" decryption=\"AES\"");
        builder.Append(" />");
        return builder.ToString();
    }

    /// <summary>
    /// Generates a string of random hex digits of the specified
    /// number of bytes.
    /// </summary>
    /// <param name="length">Number of bytes to generate</param>
    protected static string GenerateKey(int length)
    {
        RNGCryptoServiceProvider rngCsp = new RNGCryptoServiceProvider();
        byte[] buff = new byte[length];
        rngCsp.GetBytes(buff);
        StringBuilder sb = new StringBuilder(buff.Length * 2);
        for (int i = 0; i < buff.Length; i++)
            sb.Append(string.Format("{0:X2}", buff[i]));
        return sb.ToString();
    }
}

Now just call the MachineKey.Generate method

private void btnGenerate_Click(object sender, EventArgs e)
{
    MachineKeyVersion version;

    if (radNet1.Checked)
        version = MachineKeyVersion.Net1;
    else
        version = MachineKeyVersion.Net2;

    txtMachineKey.Text = MachineKey.Generate(version);
}

Reference: http://www.blackbeltcoder.com/Articles/asp/generating-a-machinekey-element