Nullable double NaN comparison in C#

Question

I have 2 nullable doubles, an expected value and an actual value (let\'s call them value and valueExpected). A percentage is found using 100 * (value / valueExpected). Howev

Answer 1

I had the same issue and I solved it with casting the double? with double

double.IsNaN((double)myDouble)

this will return true if NaN and false if not