C#

using System;
 
class Test2 : Test
{
  static void Main()
  {
    Test2 t = new Test2();
    t.Foo += new EventHandler(t.Test_Foo);
 
    if (t.FooEvent != null)
      t.FooEvent(t, EventArgs.Empty);
  }
 
  private void Test_Foo(object sender, EventArgs e)
  {
    Console.WriteLine("Hello, world!");
  }
}

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int count = dataSet1.Tables["MyTable"].Rows.Count;

using System;
using System.Runtime.InteropServices;
using System.Text;
 
class EnumWindowExample
{
  static void Main(string[] args)
  {
    if (args.Length < 1)
    {
      Console.Error.WriteLine("Error: Please specify a window class.");
      Environment.Exit(1);
    }
 
    IntPtr ptr = IntPtr.Zero;
    try
    {
      ptr = Marshal.StringToHGlobalAuto(args[0]);
      EnumWindows(new EnumWindowsProc(Callback), ptr);
    }
    finally
    {
      if (ptr != IntPtr.Zero)
        Marshal.FreeHGlobal(ptr);
    }
  }
 
  [DllImport("user32.dll", CharSet=CharSet.Auto)]
  static extern bool EnumWindows(EnumWindowsProc lpEnumFunc, IntPtr lParam);
 
  [DllImport("user32.dll", CharSet=CharSet.Auto)]
  static extern int GetClassName(IntPtr hWnd, [Out] StringBuilder lpClassName,
    int nMaxCount);
 
  [DllImport("user32.dll", CharSet=CharSet.Auto)]
  static extern int GetWindowText(IntPtr hWnd, [Out] StringBuilder lpString,
    int nMaxCount);
 
  delegate bool EnumWindowsProc(IntPtr hwnd, IntPtr lParam);
 
  const int MAX_CLASS = 256;
  const int MAX_TITLE = 256;
 
  static bool Callback(IntPtr hwnd, IntPtr lParam)
  {
    StringBuilder windowClass = new StringBuilder(MAX_CLASS);
    StringBuilder windowTitle;
    string cls = Marshal.PtrToStringAuto(lParam);
 
    if (GetClassName(hwnd, windowClass, MAX_CLASS) != 0)
    {
      if (string.Compare(windowClass.ToString(), cls, true) == 0)
      {
        windowTitle = new StringBuilder(MAX_TITLE);
        if (GetWindowText(hwnd, windowTitle, MAX_TITLE) != 0)
          Console.WriteLine(windowTitle.ToString());
      }
    }
 
    // Keep enumerating.
    return true;
  }
}

<br />
using System;<br />
using System.Diagnostics;<br />
<br />
namespace EnumProcesses<br />
{<br />
	class EnumProcsExample<br />
	{<br />
		[STAThread]<br />
		static void Main(string[] args)<br />
		{<br />
			Console.WriteLine( "Enumerating processes..." );<br />
<br />
			Process [] processes = Process.GetProcesses( );<br />
<br />
			foreach ( Process process in processes )<br />
			{<br />
				Console.WriteLine( String.Format( "{0} : {1} ({2})", process.ProcessName, process.MainWindowTitle, process.MainWindowHandle ) );<br />
			}<br />
<br />
			Console.WriteLine( "Done." );<br />
			Console.ReadLine( );<br />
<br />
<br />
		}<br />
	}<br />
}<br />