Equivalent to IsFinite ()

Question

What is a C # replacement for the following definitions?

#define IS_FINITE(x) (0x7FF0 != (*((unsigned short*)(&x) + 3) & 0x7FF0)) 

Maybe double.IsInfinity(x) == false or double.IsNegativeInfinity(x) == false ?

Thanks.

Answer 1

 !double.IsInfinity(x) && !double.IsNaN(x) 

Literature:
http://pubs.opengroup.org/onlinepubs/009604499/functions/isfinite.html
http://msdn.microsoft.com/en-us/library/system.double.isinfinity.aspx
http://msdn.microsoft.com/en-us/library/system.double.isnan.aspx