How can I use For loop for this code?

 var RowsList = new List<PersonelCardClass>();
for (int i = 0; i < dataGridView1.MasterTemplate.Rows.Count-1; i++)             
{ 
  var row=dataGridView1.Rows[i]; //current row
  RowsList.Add(new PersonelCardClass() //assign cells to one object for every row
  {
      carddate = row.Cells[0].Value== null ? "": row.Cells[0].Value,   //row:i,culumn0
      reward = row.Cells[1].Value == null ? "" : row.Cells[1].Value,   //row:i,culumn1
      penalti = row.Cells[2].Value== null ? "" : row.Cells[2].Value,   //row:i,column2
      vacationHours = row.Cells[3].Value== "" ?"00:00" :row.Cells[3].Value, //row:i,column3
      overTimeHours = row.Cells[4].Value== "" ? "00:00": row.Cells[4].Value, //row:i,column4
      workHours = row.Cells[5].Value== "" ? "00:00":row.Cells[5].Value,      //row:i,column5
      mrnngEntranceTime = row.Cells[6].Value== "" ? "00:00": new row.Cells[6].Value    //rowi,column6
  } );
                    
}
return RowsList; //return collection of objects