dataGridView1.Rows.Add(   ) ;

dataGridView1.Columns.Add("columnName1", "Column 1 Header");
dataGridView1.Columns.Add("columnName2", "Column 2 Header");

var row1 = new DataGridViewRow();
row1.Cells.Add(new DataGridViewImageCell { Value = new Bitmap(@"C:Pathtoimage.jpg") });
row1.Cells.Add(new DataGridViewTextBoxCell { Value = "string" });
dataGridView1.Rows.Add(row1);

var row2 = new DataGridViewRow();
row2.Cells.Add(new DataGridViewTextBoxCell { Value = "string"});
row2.Cells.Add(new DataGridViewImageCell { Value = new Bitmap(@"C:Pathtoimage.jpg") });
dataGridView1.Rows.Add(row2);