Hi Pascal,

Unless you seek help from people understanding French, please translate the error message to English.

Anyhow,  DataGridView.Rows.RemoveAt(index) should work just fine.  How do you create the DataGridView/Rows?

The code below works fine in VS 2005 and Orcas

        DataGridView dataGridView1 = new DataGridView();
        protected override void OnLoad(EventArgs e)
        {
            this.Controls.Add(dataGridView1);
            dataGridView1.Columns.Add("Column", "Column");
            dataGridView1.Rows.Add(3);
        }

        private void button1_Click(object sender, EventArgs e)
        {
            dataGridView1.Rows.RemoveAt(0);
        }