SerialPinChangedEventHandler not getting triggered: Serial Port on C#

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C#

C#4.0

serial-port

I am Writing an Application to get DSR, CD and CST pin Status of Serial Port but i am getting as false always whereas with the same device module i am able to get the things in VB but not in C#.
here is Code Snippet:

_serialPort = new SerialPort();

_serialPort.Open();

if (!_serialPort.IsOpen)
{
Console.WriteLine("Unable to open COM1, returning");
return;
}
else
{
Console.WriteLine("COM1 Opened");
_serialPort.RtsEnable = true;
}

_serialPort.PinChanged += new SerialPinChangedEventHandler(_serialPort_PinChanged);


static void _serialPort_PinChanged(object sender, SerialPinChangedEventArgs e)
{
Console.WriteLine("Pin Changed");
//throw new NotImplementedException();
}


I Have tried it manually checking in while loop as:

while (_continue)
{

try
{
if (SerialPinChange.DsrChanged.Equals(true))
{
Console.WriteLine("DSR Changed"); //Just to Check

}

if (_serialPort.DsrHolding != bDSRStatus )
{
if (_serialPort.DsrHolding)
{
Console.WriteLine("DSR UP");
bDSRStatus = _serialPort.DsrHolding;
}
else
{
Console.WriteLine("DSR Down");
bDSRStatus = _serialPort.DsrHolding;
}
}
}
}