I am binding a List to DataGridView:

public partial class MainForm : Form
{
    private class LogEntry
    {
        public DateTime TimeStamp;
        public string Message;
    }

    List<LogEntry> _logEntries = new List<LogEntry>();

    private void MainForm_Load(object sender, EentArgs e)
    {
        grid1.DataSource = _logEntries;
    }

    public void AddCommItem(string msg)
    {
        _logEntries.Add(new LogEntry { TimeStamp = DateTime.Now, Message = msg });
    }
}

It doesn’t matter how do I bind the list to the grid, through BindingSource or directly, the result is always the same:

The grid shows as many rows as the list has items, but all cells are displayed as NULL values.

How to make the grid to display data in the cells?