/// <summary>
/// Calls BN_add()
/// </summary>
/// <param name="lhs"></param>
/// <param name="rhs"></param>
/// <returns></returns>
public static BigNumber operator +(BigNumber lhs, BigNumber rhs)
{
BigNumber ret = new BigNumber();
Native.ExpectSuccess(Native.BN_add(ret.Handle, lhs.Handle, rhs.Handle));
return(ret);
}