C#程序启动前检测并确保使用的字体已安装

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;

namespace GlobalResource
{
    public class FontHelper
    {
        [DllImport("kernel32.dll", SetLastError = true)]
        static extern int WriteProfileString(string lpszSection, string lpszKeyName, string lpszString);
        [DllImport("gdi32")]
        private static extern int AddFontResource(string lpFileName);

        /// <summary>安装字体</summary>
        /// <param name="fontPath">要安装的字体物理路径[包括文件名和扩展名]</param>
        public static void InstallFont(string fontPath)
        {
            string fontFileName = Path.GetFileName(fontPath);
            string fontNameWithoutExtenstion = Path.GetFileNameWithoutExtension(fontPath);
            string FontPath = Environment.GetEnvironmentVariable("WINDIR") + "\\fonts\\" + fontFileName;
            if (!File.Exists(FontPath))//[[判断系统文件夹中是否存在字体文件,不存在时执行字体安装]]
            {
                File.Copy(fontPath, FontPath);
                AddFontResource(FontPath);
                WriteProfileString("fonts", fontNameWithoutExtenstion + "(TrueType)", fontFileName);
            }
        }
        /// <summary>
        /// 获取所有安装的字体名称[[操作系统已经删除的字体，仍然在此系统枚举中]]
        /// </summary>
        /// <returns></returns>
        public static List<string> GetFontNames
        {
            get
            {
                List<string> listFamily = new List<string>();
                System.Drawing.Text.InstalledFontCollection fonts = new System.Drawing.Text.InstalledFontCollection();
                foreach (System.Drawing.FontFamily family in fonts.Families)
                {
                    listFamily.Add(family.Name);
                }
                return listFamily;
            }
        }
    }
}