how to run(F5) windows service from visual studio

Copied from here.

static void Main(string[] args)  
{  
    DemoService service = new DemoService();  

    if (Environment.UserInteractive)  
    {  
        service.OnStart(args);  
        Console.WriteLine("Press any key to stop program");  
        Console.Read();  
        service.OnStop();  
    }  
    else 
    {  
        ServiceBase.Run(service);  
    }  
}  

This should allow you to run from within Visual Studio.

Another way would be to embed a programmatic breakpoint in your code by calling System.Diagnostics.Debugger.Break(). When you place this in, say, the OnStart() callback of your service and start your service from the Services console, the programmatic breakpoint will trigger a dialog box that allows you to attach to an existing instance of Visual Studio or to start a new instance. This is actually the mechanism I use to debug my service.