internal static extern double Divide(MyMathFuncsSafeHandle ptr, double a, double b);
internal static extern double Multiply(MyMathFuncsSafeHandle ptr, double a, double b);
public MyMathFuncs() { handle = MyMathFuncsWrapper.CreateMyMathFuncs(); }
internal static extern double Subtract(MyMathFuncsSafeHandle ptr, double a, double b);
internal static extern void DisposeMyMathFuncs(MyMathFuncsSafeHandle ptr);