OperatingSystem os = System.Environment.OSVersion;Console.WriteLine(“Platform: {0}”, os.Platform);Console.WriteLine(“Service Pack: {0}”, os.ServicePack);Console.WriteLine(“Version: {0}”, os.Version);Console.WriteLine(“VersionString: {0}”, os.VersionString);Console.WriteLine(“CLR Version: {0}”, System.Environment.Version);

private static UInt32 CountPhysicalProcessors(){ManagementObjectSearcher objects = new ManagementObjectSearcher(“SELECT * FROM Win32_ComputerSystem”);ManagementObjectCollection coll = objects.Get();foreach(ManagementObject obj in coll){return (UInt32)obj[“NumberOfProcessors”];} return 0;}private static UInt64 CountPhysicalMemory(){ManagementObjectSearcher objects =new ManagementObjectSearcher(“SELECT * FROM Win32_PhysicalMemory”);ManagementObjectCollection coll = objects.Get();UInt64 total = 0;foreach (ManagementObject obj in coll){total += (UInt64)obj[“Capacity”];}return total;}

Console.WriteLine(“Machine: {0}”, Environment.MachineName);Console.WriteLine(“# of processors (logical): {0}”, Environment.ProcessorCount);Console.WriteLine(“# of processors (physical): {0}”  CountPhysicalProcessors());Console.WriteLine(“RAM installed: {0:N0} bytes”,  CountPhysicalMemory());Console.WriteLine(“Is OS 64-bit? {0}”,   Environment.Is64BitOperatingSystem);Console.WriteLine(“Is process 64-bit? {0}”,  Environment.Is64BitProcess);Console.WriteLine(“Little-endian: {0}”, BitConverter.IsLittleEndian);foreach (Screen screen in  System.Windows.Forms.Screen.AllScreens){Console.WriteLine(“Screen {0}”, screen.DeviceName);Console.WriteLine(“\tPrimary {0}”, screen.Primary);Console.WriteLine(“\tBounds: {0}”, screen.Bounds);Console.WriteLine(“\tWorking Area: {0}”,screen.WorkingArea);Console.WriteLine(“\tBitsPerPixel: {0}”,screen.BitsPerPixel);}

using (RegistryKey keyRun = Registry.LocalMachine.OpenSubKey(@”Software\Microsoft\Windows\CurrentVersion\Run”)){foreach (string valueName in keyRun.GetValueNames()){Console.WriteLine(“Name: {0}\tValue: {1}”, valueName, keyRun.GetValue(valueName));}}

ServiceController controller = new ServiceController(“e-M-POWER”);      controller.Start();      if (controller.CanPauseAndContinue)      {      controller.Pause();      controller.Continue();      }      controller.Stop();      //.net提供的API中，可以实现一句话安装与卸载服务if (args[0] == "/i"){ManagedInstallerClass.InstallHelper(new string[] { Assembly.GetExecutingAssembly().Location });}else if (args[0] == "/u"){ManagedInstallerClass.InstallHelper(new string[] { "/u", Assembly.GetExecutingAssembly().Location });}

[DllImport("mscoree.dll", CharSet=CharSet.Unicode)]static extern bool StrongNameSignatureVerificationEx(string wszFilePath, bool fForceVerification, ref bool  pfWasVerified);bool notForced = false;bool verified = StrongNameSignatureVerificationEx(assembly, false, ref notForced);Console.WriteLine("Verified: {0}\nForced: {1}", verified, !notForced);

Microsoft.WindowsAPICodePack.Dialogs.CommonOpenFileDialog ofd = new  Microsoft.WindowsAPICodePack.Dialogs.CommonOpenFileDialog();ofd.AddToMostRecentlyUsedList = true;ofd.IsFolderPicker = true;ofd.AllowNonFileSystemItems = true;ofd.ShowDialog();

long available = GC.GetTotalMemory(false);Console.WriteLine(“Before allocations: {0:N0}”, available);int allocSize = 40000000;byte[] bigArray = new byte[allocSize];available = GC.GetTotalMemory(false);Console.WriteLine(“After allocations: {0:N0}”, available);

System.Diagnostics.Stopwatch timer = new System.Diagnostics.Stopwatch();timer.Start();Decimal total = 0;int limit = 1000000;for (int i = 0; i < limit; ++i){total = total + (Decimal)Math.Sqrt(i);}timer.Stop();Console.WriteLine(“Sum of sqrts: {0}”,total);Console.WriteLine(“Elapsed milliseconds: {0}”,timer.ElapsedMilliseconds);Console.WriteLine(“Elapsed time: {0}”, timer.Elapsed);

class AutoStopwatch : System.Diagnostics.Stopwatch, IDisposable{public AutoStopwatch(){ Start();}public void Dispose(){Stop();Console.WriteLine(“Elapsed: {0}”, this.Elapsed);}}

using (new AutoStopwatch()){Decimal total2 = 0;int limit2 = 1000000;for (int i = 0; i < limit2; ++i){total2 = total2 + (Decimal)Math.Sqrt(i);}}

class AutoWaitCursor : IDisposable{private Control _target;private Cursor _prevCursor = Cursors.Default;public AutoWaitCursor(Control control){if (control == null){throw new ArgumentNullException(“control”);}_target = control;_prevCursor = _target.Cursor;_target.Cursor = Cursors.WaitCursor;}public void Dispose(){_target.Cursor = _prevCursor;}}