C#

public void ShowOracleException() 
{
   OracleConnection myConnection =
      new OracleConnection("Data Source=Oracle8i;Integrated Security=yes");

   try 
   {
      myConnection.Open();
   }
   catch (OracleException e) 
   {
     string errorMessage = "Code: " + e.Code + "\n" +
                           "Message: " + e.Message;

     System.Diagnostics.EventLog log = new System.Diagnostics.EventLog();
     log.Source = "My Application";
     log.WriteEntry(errorMessage);
     Console.WriteLine("An exception occurred. Please contact your system administrator.");
   }
}

blah'; drop table Products --

OracleCommand cmd = new OracleCommand(conn,
  "insert Products values (:emp_id)");
try
{
  cmd.Parameters.Add("emp_id", OracleType.Number, 8).Value =
    int.Parse(co_emid.Text); // could throw an exception for improper format
  conn.Open();
  cmd.ExecuteNonQuery();
}
catch (FormatException)
{
  MessageBox.Show("Invalid employee id.");
  co_emid.Focus();
}
finally
{
  conn.Close();
}

strSQL = "INSERT Products VALUES (emp_id(" + co_emid.Text + "))";

form.Hide();

form.Show();

Cannot implicitly convert type 'Microsoft.Win32.SessionEndReasons' to 'bool'

If you are using SessionEnding in a Windows form to detect a system logoff or reboot,
there is no deterministic way to decide whether the
System.Windows.Forms.Form.Closing event will fire before this event.

If you want to perform some special tasks before System.Windows.Forms.Form.Closing is fired,
you need to ensure that SessionEnding fires before System.Windows.Forms.Form.Closing.
To do this, you need to trap the WM_QUERYENDSESSION in the form by
overriding the WndProc function. The following example demonstrates
how to do this in a deterministic way,