// Declare the controls to be used.
private BindingSource bindingSource1;
private TextBox textBox1;
private TextBox textBox2;
private DataGridView dataGridView1;
private void InitializeControlsAndDataSource()
{
  // Initialize the controls and set location, size and 
  // other basic properties.
  this.dataGridView1 = new DataGridView();
  this.bindingSource1 = new BindingSource();
  this.textBox1 = new TextBox();
  this.textBox2 = new TextBox();
  this.dataGridView1.ColumnHeadersHeightSizeMode =
    DataGridViewColumnHeadersHeightSizeMode.AutoSize;
  this.dataGridView1.Dock = DockStyle.Top;
  this.dataGridView1.Location = new Point(0, 0);
  this.dataGridView1.Size = new Size(292, 150);
  this.textBox1.Location = new Point(132, 156);
  this.textBox1.Size = new Size(100, 20);
  this.textBox2.Location = new Point(12, 156);
  this.textBox2.Size = new Size(100, 20);
  this.ClientSize = new Size(292, 266);
  this.Controls.Add(this.textBox2);
  this.Controls.Add(this.textBox1);
  this.Controls.Add(this.dataGridView1);
  // Declare the DataSet and add a table and column.
  DataSet set1 = new DataSet();
  set1.Tables.Add(\"Menu\");
  set1.Tables[0].Columns.Add(\"Beverages\");
  // Add some rows to the table.
  set1.Tables[0].Rows.Add(\"coffee\");
  set1.Tables[0].Rows.Add(\"tea\");
  set1.Tables[0].Rows.Add(\"hot chocolate\");
  set1.Tables[0].Rows.Add(\"milk\");
  set1.Tables[0].Rows.Add(\"orange juice\");
  // Set the data source to the DataSet.
  bindingSource1.DataSource = set1;
  //Set the DataMember to the Menu table.
  bindingSource1.DataMember = \"Menu\";
  // Add the control data bindings.
  dataGridView1.DataSource = bindingSource1;
  textBox1.DataBindings.Add(\"Text\", bindingSource1, 
    \"Beverages\", true, DataSourceUpdateMode.OnPropertyChanged);
  textBox2.DataBindings.Add(\"Text\", bindingSource1, 
    \"Beverages\", true, DataSourceUpdateMode.OnPropertyChanged);
  bindingSource1.BindingComplete += 
    new BindingCompleteEventHandler(bindingSource1_BindingComplete);
}
private void bindingSource1_BindingComplete(object sender, BindingCompleteEventArgs e)
{
  // Check if the data source has been updated, and that no error has occured.
  if (e.BindingCompleteContext == 
    BindingCompleteContext.DataSourceUpdate && e.Exception == null)
    // If not, end the current edit.
    e.Binding.BindingManagerBase.EndCurrentEdit();
}

using System;
using System.Drawing;
using System.Windows.Forms;
using System.Data;
namespace BindingSourceMultipleForms
{
  public class MainForm : Form
  {
    public MainForm()
    {
      this.Load += new EventHandler(MainForm_Load);
    }
    private BindingSource bindingSource1;
    private Button button1;
    private void MainForm_Load(object sender, EventArgs e)
    {
      InitializeData();
    }
    private void InitializeData()
    {
      bindingSource1 = new System.Windows.Forms.BindingSource();
      // Handle the BindingComplete event to ensure the two forms
      // remain synchronized.
      bindingSource1.BindingComplete += 
        new BindingCompleteEventHandler(bindingSource1_BindingComplete);
      ClientSize = new System.Drawing.Size(292, 266);
      DataSet dataset1 = new DataSet();
      // Some xml data to populate the DataSet with.
      string musicXml =
        \"<?xml version=\'1.0\' encoding=\'UTF-8\'?>\" +
        \"<music>\" +
         \"<recording><artist>Dave Matthews</artist>\" +
         \"<cd>Under the Table and Dreaming</cd>\" + 
         \"<releaseDate>1994</releaseDate><rating>3.5</rating></recording>\" +
         \"<recording><artist>Coldplay</artist><cd>X&Y</cd>\" + 
         \"<releaseDate>2005</releaseDate><rating>4</rating></recording>\" +
         \"<recording><artist>Dave Matthews</artist>\" + 
         \"<cd>Live at Red Rocks</cd>\" + 
         \"<releaseDate>1997</releaseDate><rating>4</rating></recording>\" +
         \"<recording><artist>U2</artist>\" + 
         \"<cd>Joshua Tree</cd><releaseDate>1987</releaseDate>\" + 
         \"<rating>5</rating></recording>\" +
         \"<recording><artist>U2</artist>\" +
         \"<cd>How to Dismantle an Atomic Bomb</cd>\" + 
         \"<releaseDate>2004</releaseDate><rating>4.5</rating></recording>\" +
         \"<recording><artist>Natalie Merchant</artist>\" +
         \"<cd>Tigerlily</cd><releaseDate>1995</releaseDate>\" +
         \"<rating>3.5</rating></recording>\" +
         \"</music>\";
      // Read the xml.
      System.IO.StringReader reader = new System.IO.StringReader(musicXml);
      dataset1.ReadXml(reader); 
      // Get a DataView of the table contained in the dataset.
      DataTableCollection tables = dataset1.Tables;
      DataView view1 = new DataView(tables[0]);
      // Create a DataGridView control and add it to the form.
      DataGridView datagridview1 = new DataGridView();
      datagridview1.ReadOnly = true;
      datagridview1.AutoGenerateColumns = true;
      datagridview1.Width = 300;
      this.Controls.Add(datagridview1);
      bindingSource1.DataSource = view1;
      datagridview1.DataSource = bindingSource1;
      datagridview1.Columns.Remove(\"artist\");
      datagridview1.Columns.Remove(\"releaseDate\");
      // Create and add a button to the form. 
      button1 = new Button();
      button1.AutoSize = true;
      button1.Text = \"Show/Edit Details\";
      this.Controls.Add(button1);
      button1.Location = new Point(50, 200);
      button1.Click += new EventHandler(button1_Click);
    }
    // Handle the BindingComplete event to ensure the two forms
    // remain synchronized.
    private void bindingSource1_BindingComplete(object sender, BindingCompleteEventArgs e)
    {
      if (e.BindingCompleteContext == BindingCompleteContext.DataSourceUpdate
        && e.Exception == null)
        e.Binding.BindingManagerBase.EndCurrentEdit();
    }
    // The detailed form will be shown when the button is clicked.
    private void button1_Click(object sender, EventArgs e)
    {
      DetailForm detailForm = new DetailForm(bindingSource1);
      detailForm.Show();
    }
    [STAThread]
    static void Main()
    {
      Application.EnableVisualStyles();
      Application.Run(new MainForm());
    }
  }
  // The detail form class. 
  public class DetailForm : Form
  {
    private BindingSource formDataSource;
    // The constructor takes a BindingSource object.
    public DetailForm(BindingSource dataSource)
    {
      formDataSource = dataSource;
      this.ClientSize = new Size(240, 200);
      TextBox textBox1 = new TextBox();
      this.Text = \"Selection Details\";
      textBox1.Width = 220;
      TextBox textBox2 = new TextBox();
      TextBox textBox3 = new TextBox();
      TextBox textBox4 = new TextBox();
      textBox4.Width = 30;
      textBox3.Width = 50;
      // Associate each text box with a column from the data source.
      textBox1.DataBindings.Add(\"Text\", formDataSource, \"cd\", true, DataSourceUpdateMode.OnPropertyChanged);
      textBox2.DataBindings.Add(\"Text\", formDataSource, \"artist\", true);
      textBox3.DataBindings.Add(\"Text\", formDataSource, \"releaseDate\", true);
      textBox4.DataBindings.Add(\"Text\", formDataSource, \"rating\", true);
      textBox1.Location = new Point(10, 10);
      textBox2.Location = new Point(10, 40);
      textBox3.Location = new Point(10, 80);
      textBox4.Location = new Point(10, 120);
      this.Controls.AddRange(new Control[] { textBox1, textBox2, textBox3, textBox4 });
    }
  }
}