启动器备份

Program.cs

using Microsoft.Win32;
using System;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;

namespace Installer
{
    public class Installer
    {
        public static void Main()
        {
            var directories = Directory.GetDirectories(Directory.GetCurrentDirectory());
            var path = directories.Length == 1 ? directories.First() : null;
            var wpfPath = "ErogeHelper.Installer.exe";
            var winUIPath = "ErogeHelper.Installer.WinUI.exe";
            if (path != null)
            {
                wpfPath = Path.Combine(path, wpfPath);
                winUIPath = Path.Combine(path, winUIPath);
            }

            var isWin7 = Environment.OSVersion.Version < new Version(6, 2);
            if (isWin7)
            {
                var support = CheckOSIsNetCoreSupported();
                if (!support)
                {
                    MessageBox((IntPtr)0, "Please install KB2533623 patch!", "Eroge Helper", 0);
                    return;
                }
            }

            var releaseIdStr = Registry.GetValue(@"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion", "ReleaseId", "").ToString();
            var IsOrAfter1809 = false;
            if (int.TryParse(releaseIdStr, out var releaseId))
            {
                IsOrAfter1809 = releaseId >= 1809;
            }
            if (IsOrAfter1809 && File.Exists(winUIPath))
            {
                Process.Start(winUIPath);
            }
            else
            {
                Process.Start(wpfPath);
            }
        }

        [DllImport("kernel32.dll", CharSet = CharSet.Unicode, EntryPoint = "GetModuleHandleW", ExactSpelling = true, SetLastError = true)]
        public static extern IntPtr GetModuleHandle([In][MarshalAs(UnmanagedType.LPWStr)] string lpModuleName);

        [DllImport("kernel32.dll", CharSet = CharSet.Ansi, ExactSpelling = true, SetLastError = true, ThrowOnUnmappableChar = true)]
        public static extern IntPtr GetProcAddress([In] IntPtr hModule, [In][MarshalAs(UnmanagedType.LPStr)] string lpProcName);

        [DllImport("User32.dll", CharSet = CharSet.Unicode)]
        public static extern int MessageBox(IntPtr h, string m, string c, int type);

        public static bool CheckOSIsNetCoreSupported()
        {
            var kernel32ModuleHandle = GetModuleHandle("kernel32");
            if (kernel32ModuleHandle != IntPtr.Zero)
            {
                // Three functions required by .Net Core, it's enough to check one
                //  - SetDefaultDllDirectories
                //  - AddDllDirectory
                //  - RemoveDllDirectory
                var setDefaultDllDirectoriesProcAddress = GetProcAddress(kernel32ModuleHandle, "SetDefaultDllDirectories");
                return setDefaultDllDirectoriesProcAddress != IntPtr.Zero;
            }
            else
            {
                throw new InvalidOperationException("Unable to get the module name of Kernel32");
            }
        }
    }
}