Hello,
  I have to read data from serail port(com) and then send that data to other computer through tcp/ip communication.
  wht i m thinking is to read the data in serial port store it in some file and then send it through some other pc through tcp/ip.Is there any way to avoid storing the data. Or is there any other method.
 thanks in advance.

watashi

I assume that the other computers are connected in a LAN.
If the other computers have defined a "shared" folder you can simply store a file there.
Otherwise you will have to build a program (windows service) that runs on the other computers and listens to a tcp-port (see the chapters about .NET Remoting and Windows Services in "Professional Visual C# 2005"). You can also build a web-service (if you have IIS available on the other computers). Of course you will have to define one or a few classes (message-classes) for sending/receiving the data and an appropriate version of .NET Framework must be installed on every computer.
If you use remoting or a web-service you don't have to store the data first. You can directly send it to the other computers, but as I mentioned before, the other computers must have some program running for communication.

Nico