“Step over” when debugging multithreaded programs in Visual Studio

Question

One thing that annoys me when debugging programs in Visual Studio (2005 in my case) is that when I use \"step over\" (by pressing F10) to execute to the next line

Answer 1

Apparently, Visual Studio 2010 only switches to other threads if you press F10 when the debugger had to break in that thread before or if a breakpoint is set which will be hit in this thread.

I used the following code to test the behavior:

class Program
{
    static void Main(string[] args)
    {
        var t = new Thread(new ThreadStart(Work));
        t.Start();

        for (int i = 0; i < 20; i++)
        {
            Thread.Sleep(1000);
            Console.WriteLine("............");
        }

        t.Join();
    }

    static void Work()
    {
        for (int i = 0; i < 20; i++)
        {
            Thread.Sleep(1000);
            Console.WriteLine("ZZzzzzzzzzzzzzzz");
        }
    }
}

If you just stept to the program or add a breakpoint in the Main() method, hitting F10 only steps through the code from the main thread.

If you add a breakpoint in the Work() method, the debugger steps through both threads.

This behavior of Visual Studio makes sense but it all seems like an undocumented feature to me...