How do I kill a process I use to show an image file?

Try below,

Process process = Process.Start("imagefilename.jpg");
if (process != null)
{
    process.WaitForInputIdle(); // wait for the process to become idle
    process.Kill(); // kill the process
}

Thanks

Whenever I use proc.Kill(); I get: "No process is associated with this object."

I think I get what is happening. As soon as the Windows Photo Viewer is launched by proc.Start, the process immediately exits. So what I really need is a way to find the Windows Photo Viewer instance and kill it. In a run of my program, I will have launched dozens of images, so I need to be able to kill the current one before launching the next one.

How do I kill a process by its handle? the Kill method doesn't take parameters.

Thank you.

Process proc = Process.Start(startInfo); ALWAYS returns null for me.

So I will experiment with:
                ProcessStartInfo startinfo = new ProcessStartInfo(imagefilename);
                proc = new Process();
                proc.StartInfo = startinfo;
                proc.Start();
                handle = proc.Handle;

ProcessStartInfo startInfo = new ProcessStartInfo(imagefilename);
Process imageProcess = Process.Start(startInfo);

if (imageProcess != null)
{
    imageProcess.WaitForExit(); // wait for the process to exit
    imageProcess.Dispose(); // dispose of the process resources
}

we use ProcessStartInfo to create a new process and specify the file name of the image to be displayed. Then we start the process using Process.Start() and store the returned Process object in a variable imageProcess.

To kill a process that displays an image file, you first need to start the process using Process.Start() and then obtain the process handle to kill it.