Assuming that you have them saved in a file and you know the location to it. You could try this:
public string ReadFile(string Location)
{
using(StreamReader Reader = new StreamReader(Location))
{
return Reader.ReadToEnd();
}
}
public byte[] GetPacket(string Packet)
{
return Encoding.ASCII.GetBytes(Packet);
}
void WhenToSend()
{
SendPacket(GetPacket(ReadFile(Location)));
}