【c#】判断double值是否等于NaN

using System;
 
public class Test
{
	public static void Main()
	{
		
		double b=1.1;
		double c=double.NaN;
		Console.WriteLine("b="+b);
		Console.WriteLine("c="+c);
		Console.WriteLine("b==double.NaN: "+(b==double.NaN));
		Console.WriteLine("double.IsNaN(b): "+double.IsNaN(b));
		
		Console.WriteLine("c==double.NaN: "+(c==double.NaN));
		Console.WriteLine("double.IsNaN(c): "+double.IsNaN(c));
	}
}

运行结果：

b=1.1

c=NaN

b==double.NaN: False

double.IsNaN(b): False

c==double.NaN: False

double.IsNaN( c): True