vb System.Double.IsNaN类(方法)实例源码

' This will return true.
If Double.IsNaN(0 / zero) Then
    Console.WriteLine("Double.IsNan() can determine whether a value is not-a-number.")
End If

' 导入命名空间
Imports System                

Module MyModule

  Sub Main()
    If (Double.IsNaN("1.2")) Then
      Console.WriteLine("Not a Number.")
    End If
  End Sub
End Module