Convert SQL Server Management Studio SSMS Varbinary Column Output to Byte Array C#

ConvertVarbinaryToByteArray.cs

static void Main(string[] args)
{
    // read input from local file (could also pass in via args)
    var hexInput = File.ReadAllText("hexInput.txt");

    // convert to binary, strip off first two chars 'Ox'
    var byteArray = StringToByteArray(hexInput.Substring(2));

    // write bytes to file
    File.WriteAllBytes("output.file", byteArray);
}

public static byte[] StringToByteArray(string hex)
{
    int cnt = hex.Length;

    byte[] bytes = new byte[cnt / 2];

    for (int i = 0; i < cnt; i += 2)
        bytes[i / 2] = Convert.ToByte(hex.Substring(i, 2), 16);

    return bytes;
}