Imports System
Public Class Test
Public Shared Sub Main()
dim d = DBnull.Value
console.writeline("yes".Equals(d))
End Sub
End Class
SW1wb3J0cyBTeXN0ZW0KClB1YmxpYyBDbGFzcyBUZXN0CglQdWJsaWMgU2hhcmVkIFN1YiBNYWluKCkKCQlkaW0gZCA9IERCbnVsbC5WYWx1ZQogICAgICAgIGNvbnNvbGUud3JpdGVsaW5lKCJ5ZXMiLkVxdWFscyhkKSkKCUVuZCBTdWIKRW5kIENsYXNz