using System;
using System.Windows.Forms;

class ex : Form
{
    DataGridView dgv = new DataGridView();

    ex()
    {
        Width = 400;
        dgv.Height = 400;
        dgv.Width = 400;
        dgv.ColumnCount = 3;
        dgv.RowCount = 3;
        Controls.Add(dgv);

        dgv.Columns[0].Name = "CustomerID";
        dgv.Columns[1].Name = "FirstName";
        dgv.Columns[2].Name = "LastName";

        dgv.Rows[0].Cells[0].Value = "1";
        dgv.Rows[0].Cells[1].Value = "John";
        dgv.Rows[0].Cells[2].Value = "Smith";
        dgv.Rows[1].Cells[0].Value = "2";
        dgv.Rows[1].Cells[1].Value = "Jane";
        dgv.Rows[1].Cells[2].Value = "Smith";
        dgv.Rows[2].Cells[0].Value = "3";
        dgv.Rows[2].Cells[1].Value = "Bob";
        dgv.Rows[2].Cells[2].Value = "Jones";
    }

    [STAThread]
    static public void Main()
    {
        Application.Run(new ex());
    }
}