or
using System; using System.Collections.Generic; using System.Windows.Forms; namespace GridTest1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); List<Data> list = new List<Data>(); list.Add(new Data() { Value = "A" }); list.Add(new Data() { Value = "B" }); list.Add(new Data() { Value = "C" }); bindingSource1.DataSource = list; } private void btnChangeData_Click(object sender, EventArgs e) { List<Data> list = new List<Data>(); list.Add(new Data() { Value = "A" }); bindingSource1.DataSource = list; } } public class Data { public string Value { get; set; } } } 