public virtual string backend_name() { if (Environment.Is64BitProcess) { string ret = CoolPropPINVOKE64.AbstractState_backend_name(swigCPtr); //if (CoolPropPINVOKE64.SWIGPendingException.Pending) throw CoolPropPINVOKE64.SWIGPendingException.Retrieve(); return(ret); } else { string ret = CoolPropPINVOKE.AbstractState_backend_name(swigCPtr); //if (CoolPropPINVOKE.SWIGPendingException.Pending) throw CoolPropPINVOKE.SWIGPendingException.Retrieve(); return(ret); } }