Imports System
Imports Microsoft.VisualBasic
Public Class Program
Public Shared Sub Main()
Dim b As Boolean = String.IsNullOrWhiteSpace(" ")
Console.WriteLine(b)
b = String.IsNullOrWhiteSpace(Nothing)
Console.WriteLine(b)
b = String.IsNullOrWhiteSpace("")
Console.WriteLine(b)
b = String.IsNullOrWhiteSpace(String.Empty)
Console.WriteLine(b)
b = String.IsNullOrWhiteSpace(Environment.NewLine)
Console.WriteLine(b)
b = String.IsNullOrWhiteSpace(vbCr)
Console.WriteLine(b)
b = String.IsNullOrWhiteSpace(vbCrLf)
Console.WriteLine(b)
b = String.IsNullOrWhiteSpace(vbVerticalTab)
Console.WriteLine(b)
b = String.IsNullOrWhiteSpace("c#")
Console.WriteLine(b)
End Sub
End Class
' run:
'
' True
' True
' True
' True
' True
' True
' True
' True
' False
'
