Passing Data to a Thread

Sometimes you’ll want to pass arguments to the thread’s startup method. The easiest way to do this is with a lambda expression that calls the method with the desired arguments:

static void Main()
{
  Thread t = new Thread ( () => Print ("Hello from t!") );
  t.Start();
}

static void Print (string message) { Console.WriteLine (message); }

With this approach, you can pass in any number of arguments to the method. You can even wrap the entire implementation in a multistatement lambda:

new Thread (() =>
{
  Console.WriteLine ("I'm running on another thread!");
  Console.WriteLine ("This is so easy!");
}).Start();

Lambda expressions didn’t exist prior to C# 3.0. So you might also come across an old-school technique, which is to pass an argument into Thread’s Start method: