dataGridView1.Rows[0].DefaultCellStyle.BackColor = Color.Black; Thread.Sleep(5000); dataGridView1.Rows[0].DefaultCellStyle.BackColor = Color.Yellow;
dataGridView1.Rows[0].DefaultCellStyle.BackColor = Color.Black; Application.DoEvents(); Thread.Sleep(5000); dataGridView1.Rows[0].DefaultCellStyle.BackColor = Color.Yellow;
var
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