Passing parameters to timer method?

[Olilve Oyl]

I am making a C# .net application. Now I need to use a timer because after elapse of every 20 seconds I need to add a special character ( maybe an "*"). Now since I am using the text file in the main method also and in the timer method also is there any way by which I can pass the StreamWriter object to the method. I tried to open it again but I get only the most recent written line. Is there any other way to solve this problem?

Thanks.

[GaryTexmo]

I don't think you can pass a parameter to it since the tick method happens in response to time timer triggering the event. It's the timer itself that specifies the parameters.

That said, you can make the stream writer a class variable and attach it to the appropriate stream. Then your event handler for the tick event can access it. There's one important thing though... the tick happens in a separate thread so you'll want to make sure you access the stream in a lock block to make sure that there's no contention for the resource.

lock (myStream)
{
  myStream.ReadLine(...);
  ...
}