try
{
    // ......
}
catch(Exception exception)
{
    // ......
}
finally
{
    // ......
}

try
{
    // ......
}
catch(QString exception)
{
    // ......
}

// 修正，C#有更好的处理方法

try
{
    throw "ClassName.MethodName()";
}
catch(SQtring exception)
{
    throw "NewClassName.MethodName():"+exception.Message;
}

string Message(Exception exception)
{
    var result = string.Empty;
    if(exception != null)
    {
        result += exception.Message;
        result += "\n";
        result += exception.StackTrace;
        result += "\n";
        result += Message(exception.InnerException);
    }

    return result;
}

Console.WriteLine(Message(exception));
Console.ReadKey();

MessageBox.Show(Message(exception));
Application.Exit();

  QMessageBox *message=new QMessageBox();
  message->setText(exception);
  message->show();
  return 0;