如何以二进制格式将数据发送到端口

I am newbie in Low level programming. In my project(C#.NET) we are using EDBS protocol(7 bit format) for communication and i have the data in bit format to send like 00101010 so we would please guide me how to send these to port.I know that the serial port class accepts data in binary format but dont know how convert the bit format into byte .I am newbie in Low level programming. In my pro