double

http://stackoverflow.com/questions/4997085/how-to-convert-to-double-with-2-precision-string-after-dot

https://msdn.microsoft.com/en-us/library/system.double.parse(v=vs.110).aspx

https://msdn.microsoft.com/ru-ru/library/0kb11ck8(v=vs.110).aspx

http://stackoverflow.com/questions/7453900/c-sharp-double-to-decimal-precision-loss

http://stackoverflow.com/questions/1354924/how-do-i-parse-a-string-with-a-decimal-point-to-a-double

http://stackoverflow.com/questions/611552/c-sharp-converting-20-digit-precision-double-to-string-and-back-again