public void declineContract(int store, string username, int sessionID)
{
if (store < 0)
{
throw new ILLArgumentException("illegal store number");
}
if (username == null)
{
throw new ArgumentNullException("null username");
}
if (username.Length == 0)
{
throw new ILLArgumentException("illegal username");
}
db.declineContract(store, username, sessionID);
}
