Visual Studio 2008 c#

[alberto_gc]

Hol que tal buen dia tengan todos, pues aqui de nuevo preguntando sobre un errror de c# y lo manejo con visual estudio 2008 el codigo lo que hace es una simulacion de acuario en el cual inserta modifica borra y muestra, aja el insertar lo hace pero al momento de darle en modificar borrrar y mostrar me manda un error..
este es mi codigo:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication2
{
public partial class Form4 : Form
{
public Form4()
{
InitializeComponent();
}

private void Form4_Load(object sender, EventArgs e)
{
oleDbDataAdapter1.Fill(dataSet11);
oleDbDataAdapter2.Fill(dataSet11);
}

private void oleDbConnection1_InfoMessage(object sender, System.Data.OleDb.OleDbInfoMessageEventArgs e)
{

}

private void button1_Click(object sender, EventArgs e)
{
oleDbCommand1.Parameters[0].Value = textBox1.Text;
oleDbCommand1.Parameters[1].Value = textBox2.Text;
oleDbCommand1.Parameters[2].Value = textBox3.Text;
oleDbCommand1.Parameters[3].Value = textBox4.Text;
oleDbCommand1.Parameters[4].Value = listBox3.Text;
oleDbCommand1.Parameters[5].Value = listBox1.Text;

oleDbConnection1.Open();
try
{
oleDbCommand1.ExecuteNonQuery();
}
catch (Exception)
{
MessageBox.Show("ocurrio un error");
}
oleDbConnection1.Close();

}

private void button2_Click(object sender, EventArgs e)
{
oleDbCommand2.Parameters[0].Value = textBox1.Text;

oleDbConnection1.Open();
try
{
oleDbCommand2.ExecuteNonQuery();
}
catch (Exception)
{
MessageBox.Show(" a ocurridoun error");
}
oleDbConnection1.Close();
}

private void button3_Click(object sender, EventArgs e)
{
oleDbCommand3.Parameters[0].Value = textBox2.Text;
oleDbCommand3.Parameters[1].Value = textBox3.Text;
oleDbCommand3.Parameters[2].Value = textBox4.Text;
oleDbCommand3.Parameters[3].Value = textBox1.Text;
oleDbConnection1.Open();
try
{
oleDbCommand3.ExecuteNonQuery();
}
catch (Exception)
{
MessageBox.Show(" a ocurridoun error");
}
oleDbConnection1.Close();

}

private void button4_Click(object sender, EventArgs e)
{
dataSet21.Clear();

oleDbDataAdapter4.SelectCommand.Parameters[0].Value = textBox1.Text;
oleDbDataAdapter4.Fill(dataSet21);
}

}
}