在Windows服务中获取计算机名称？

using System;
using System.Runtime.InteropServices;

public class ComputerName
{
    [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
    public static extern bool GetComputerNameEx(int nameType, StringBuilder lpBuffer, ref int lpnSize);

    public static string GetComputerName()
    {
        int size = 0;
        GetComputerNameEx(1, null, ref size);
        StringBuilder sb = new StringBuilder(size);
        GetComputerNameEx(1, sb, ref size);
        return sb.ToString();
    }
}