public virtual bool using_mass_fractions() { if (Environment.Is64BitProcess) { bool ret = CoolPropPINVOKE64.AbstractState_using_mass_fractions(swigCPtr); //if (CoolPropPINVOKE.SWIGPendingException.Pending) throw CoolPropPINVOKE.SWIGPendingException.Retrieve(); return(ret); } else { bool ret = CoolPropPINVOKE.AbstractState_using_mass_fractions(swigCPtr); //if (CoolPropPINVOKE.SWIGPendingException.Pending) throw CoolPropPINVOKE.SWIGPendingException.Retrieve(); return(ret); } }