Good day this tutorial demonstrate how to create Please Register/Login (Confirm your Email) to see this Link ! (RFID) Tag Card Reader Lets Start Coding... First open your visual studio language any version and create new project Second add the following object to your form 1. One SerialPort 2. One TextBox 3. One ListBox Setup your SerialPort. 1. BaudRate = 9600 2. DataBit = 8 3. DiscardNull = False 4. DtrEnable = False 5. HandShake = None 6. Parity = None 7. ParityRepalce = 63 8. PortName = check your com port name ether COM1 or Any but make sure your com name is correct 9. ReadBufferSize = 4096 10. RtsEnable = False 11. StopBit = One 12. WriteBufferSize = 2048 Now for the code Code: Please Register/Login (Confirm your Email) to see this Code ! Now you need an RFID Reader Device and Tag Card, Press F5 and start debugging make sure the cursor is point into TextBox1... Top your Tag Card to the device and you see the tag card data on list box. Hope this help happy happy coding... Credited to ME.