If so, in the use of DT.GetChanges () before, I have to perform EndEdit () method.
public partial class Form2 : Form
{
private DataTable DT = new DataTable("DDT");
public Form2()
{
InitializeComponent();
DT.Columns.Add(new DataColumn("Column1"));
DT.Rows.Add("bb");
this.textBox1.DataBindings.Add(new Binding("Text", this.bindingSource1, "Column1"));
}