Specify command for the CMD to open

I am doing a simple program with Visual Studio to execute some commands in CMD that I want, currently the program has only a simple screen and a button to open the cmd, but I would like to specify the command that the prompt should run.

Eg: Ipconfig, flushdns, etc.

Currently my code is like this, using System.Diagnostics

namespace Comands 
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button_Click(object sender, EventArgs e)
        {
            System.Diagnostics.Process.Start("CMD.exe");
        }
    }
}