If controller.DigitalOutAvailable(4) Then
    Dim output4State As Boolean = controller.DigitalOutBit(4)
    Dim output4Name As String = controller.DigitalOutName(4)
    Console.WriteLine("Digital Output #4 Name: {0}, State: {1}", _
                      output4Name, _
                      output4State)

    If output4State Then
    controller.DigitalOutBit(4) = False
    End If
End If

if (controller.DigitalOutAvailable[4])
{
    bool output4State   = controller.DigitalOutBit[4];
    string output4Name  = controller.DigitalOutName[4];

    Console.WriteLine("Digital Output #4 Name: {0}, State: {1}", 
                      output4Name, 
                      output4State);

    if(output4State == true)
    {
       controller.DigitalOutBit[4] = false;
    }
}