public SpecificEntropy cvmass()
 {
     if (Environment.Is64BitProcess)
     {
         return(SpecificEntropy.FromJoulesPerKilogramKelvin(CoolPropPINVOKE64.AbstractState_cvmass(swigCPtr)));
     }
     else
     {
         return(SpecificEntropy.FromJoulesPerKilogramKelvin(CoolPropPINVOKE.AbstractState_cvmass(swigCPtr)));
     }
 }