C#

string dexplorePath = Environment.GetFolderPath(
  Environment.SpecialFolder.CommonProgramFiles);
dexplorePath = Path.Combine(dexplorePath, "Microsoft Shared\Help\dexplore.exe");
// For VS.NET 2002 documentation
Process.Start(dexplorePath, "/helpcol ms-help://ms.vscc");
// For VS.NET 2003 documentation
Process.Start(dexplorePath, "/helpcol ms-help://ms.vscc.2003");

public delegate void FactorialCompleteHandler(double Factorial, double TotalCalculations);<br />
<br />
public FactorialCompleteHandler  FactorialComplete;<br />
<br />
public void add_FactorialComplete(FactorialCompleteHandler e)<br />
{<br />
    FactorialComplete = (FactorialCompleteHandler) System.Delegate.Combine(this.FactorialComplete, e);<br />
}<br />
<br />

import System.*

try
{
  // ...
}
catch (WebException ex)
{
  // Catch a WebException first
}
catch (ApplicationException ex)
{
  // Catch an ApplicationException next if not a WebException
}
catch (Exception ex)
{
  // Catch all exceptions if not WebException or ApplicationException
}

try
{
  // ...
}
catch (Exception ex)
{
  // ...
}

try
{
 // ...
}
catch
{
}

try
{
}
catch (WebException)
{
}
catch (ApplicationException)
{
}
catch (Exception)
{
}