Question

c#net检测当前程序运行的是64位机器还是32位

Answer 1

    public static class OSPlatformChecker
    {
        [DllImport("kernel32.dll", CharSet = CharSet.Ansi, SetLastError = true, ExactSpelling = true)]
        private static extern IntPtr GetProcAddress(IntPtr hModule, string methodName);

        [ReliabilityContract(Consistency.WillNotCorruptState, Cer.MayFail), DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr GetModuleHandle(string moduleName);

        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        internal static extern IntPtr GetCurrentProcess();

        [SecurityCritical]
        internal static bool DoesWin32MethodExist(string moduleName, string methodName)
        {
            IntPtr moduleHandle = GetModuleHandle(moduleName);
            if (moduleHandle == IntPtr.Zero)
            {
                return false;
            }
            return (GetProcAddress(moduleHandle, methodName) != IntPtr.Zero);
        }

        [return: MarshalAs(UnmanagedType.Bool)]
        [DllImport("kernel32.dll", SetLastError = true)]
        internal static extern bool IsWow64Process([In] IntPtr hSourceProcessHandle, [MarshalAs(UnmanagedType.Bool)] out bool isWow64);

        [SecuritySafeCritical]
        public static bool Get_Is64BitOperatingSystem()//你要的
        {
            bool flag;
            return (IntPtr.Size == 8) ||
                ((DoesWin32MethodExist("kernel32.dll", "IsWow64Process") &&
                IsWow64Process(GetCurrentProcess(), out flag)) && flag);
        }
    }