C#

using System.Collections.Generic;<br />
using System.ComponentModel;<br />
using System.Windows.Forms;<br />
<br />
class TestApplication<br />
{<br />
    static void Main()<br />
    {<br />
        var p = new Form();<br />
        p.IsMdiContainer = true;<br />
        p.WindowState = FormWindowState.Maximized;<br />
        var f1 = new TestForm();<br />
        var f2 = new Form();<br />
        f2.MdiParent = p;<br />
        f1.MdiParent = p;<br />
        f1.Show();<br />
        f2.StartPosition = FormStartPosition.Manual;<br />
        f2.Left = 300;<br />
        f2.Show();<br />
        Application.Run(p);<br />
    }<br />
}<br />
<br />
class TestForm : Form<br />
{<br />
    internal DataGridView grid = new DataGridView();<br />
    internal List<Customer> list;<br />
<br />
    public TestForm()<br />
    {<br />
        Controls.Add(grid);<br />
        BindingSource BindingSource = new BindingSource();<br />
        list = new List<Customer>();<br />
        list.Add(new Customer() { Name = "test" });<br />
        BindingList<Customer> bindingList = new BindingList<Customer>(list);<br />
        BindingSource.DataSource = bindingList;<br />
        grid.DataSource = bindingList;<br />
    }<br />
}<br />
<br />
class Customer<br />
{<br />
    public string Name { get; set; }<br />
}