How do I run diskpart from c# and hide the window?

Here is my code:
Process p = new Process();
p.StartInfo.UseShellExecute = false;
p.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
p.StartInfo.RedirectStandardOutput = true;
p.StartInfo.FileName = @"C:\Windows\System32\diskpart.exe";
p.StartInfo.RedirectStandardInput = true;
p.Start();
p.StandardInput.WriteLine("select disk " + diskNumber);
p.StandardInput.WriteLine("clean");
p.StandardInput.WriteLine("active");
p.StandardInput.WriteLine("assign");         
p.StandardInput.WriteLine("exit");
string output = p.StandardOutput.ReadToEnd();
p.WaitForExit();

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As you see, I have taken a step to make the window hidden. But it still appears.
Any trick to make it actually hide and never show, and still run the code?
LVL 2
itniflAsked:
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it_saigeDeveloperCommented:
Yes, use a Forms project (Windows Application) without a form.

1. Create a new Windows Application project.

Capture.JPG

2. Remove the auto-generated form.

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3. Resolve the error in Program.cs.

Form1 no longer exists so we can remove this line.Now you have a blank slate to work with.  From here you can implement your method directly in Program.cs or create a new class; e.g. - 
using System;
using System.Diagnostics;
using System.Windows.Forms;

namespace EE_Q28740914
{
	static class Program
	{
		static Program()
		{
			try
			{
				Application.ThreadException += OnThreadException;
				AppDomain.CurrentDomain.UnhandledException += OnApplicationUnhandledException;
			}
			catch (Exception ex)
			{
				MessageBox.Show(string.Format("Exception reported in {0} - {1} [{2}]", ex.Source, ex, ex.Message));
			}
		}

		/// <summary>
		/// The main entry point for the application.
		/// </summary>
		[STAThread]
		static void Main()
		{
			RunDiskpart(0);
			return;
		}

		private static void RunDiskpart(int diskNumber)
		{
			using (Process p = new Process())
			{
				ProcessStartInfo info = new ProcessStartInfo()
				{
					CreateNoWindow = true,
					FileName = @"C:\Windows\System32\diskpart.exe",
					RedirectStandardInput = true,
					RedirectStandardOutput = true,
					UseShellExecute = true,
					WindowStyle = ProcessWindowStyle.Hidden
				};
				p.StartInfo = info;
				p.Start();
				p.StandardInput.WriteLine("select disk " + diskNumber);
				p.StandardInput.WriteLine("clean");
				p.StandardInput.WriteLine("active");
				p.StandardInput.WriteLine("assign");
				p.StandardInput.WriteLine("exit");
				string output = p.StandardOutput.ReadToEnd();
				p.WaitForExit();
			}
		}

		private static void OnThreadException(object sender, System.Threading.ThreadExceptionEventArgs e)
		{
			MessageBox.Show(string.Format("Exception reported in {0} - {1} [{2}]", e.Exception.Source, e.Exception, e.Exception.Message));
		}

		private static void OnApplicationUnhandledException(object sender, UnhandledExceptionEventArgs e)
		{
			if (e.IsTerminating)
				MessageBox.Show(e.ExceptionObject.ToString());
		}
	}
}

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-saige-

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KraevenCommented:
Normally if you just add this on top of what you have it should be enough...
p.StartInfo.CreateNoWindow = true;

If this doesn't work I would suggest looking into the Win32API.ShowWindow give it the handle to the window and use the constant Win32API.SW_HIDE
itniflAuthor Commented:
Actually I create the diskpart process via an object, that gets created in the form, like this. 

USBMediaCustomizer MediaCustomizer = new USBMediaCustomizer(/*blabla here*/);
MediaCustomizer.PartitionDisks(SelectedUsbDisk.DiskNumber);

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I first tested your solution, and it worked. I then tested my old solution with the form, but with this added in my class method USBMediaCustomizer.PartitionDisks(line number two taken from your solution):
Process p = new Process();
p.StartInfo.CreateNoWindow = true;
p.StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
p.StartInfo.UseShellExecute = true;
p.StartInfo.RedirectStandardOutput = true;
p.StartInfo.RedirectStandardInput = true;
/* .. and so on */

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And that also worked!
Thanks! :)
itniflAuthor Commented:
Kraeven: Sorry, I would have awarded you some points for your answer, but I was writing the explanation you see above while you were writing your answer. So I didn't see your answer before I had already accepted the solution.
KraevenCommented:
LOL ;-)

No problem, I'm just glad you found a solution :-)
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