判断当前计算机用户是不是管理员身份

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Diagnostics;

namespace 判断是不是管理员身份
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            if (runcmd("net localgroup administrators").IndexOf(System.Environment.UserName) >= 0)
                InitializeComponent();
            else
                MessageBox.Show("请以管理员的身份运行！");     
        }


        /// <summary>
        /// 判断是不是以管理员
        /// </summary>
        /// <param name="command"></param>
        /// <returns></returns>
        private static string runcmd(string command)
        {
            Process p = new Process();