file link path

 private void CheckFileExists()
        {
            try
            {
                int successCount = 0;
                int failedCount = 0;
                string path = @"g:\t1";
                string path2;
                for (int i = 0; i < dataGridView1.Rows.Count-1; i++)
                {
                   path2 = path + dataGridView1.Rows[i].Cells[12].Value.ToString();
                    if (File.Exists(path2))
                    {
                        dataGridView1.Rows[i].DefaultCellStyle.BackColor = System.Drawing.Color.Aqua;
                        successCount++;
                        for (int j = 0; j <= dataGridView2.Rows.Count; j++)
                        {
                            path2 = dataGridView1.Rows[j].Cells[12].Value.ToString(); 
                            j++;
                        }
                        
                   
                    }
                    else
                    {
                        dataGridView1.Rows[i].DefaultCellStyle.BackColor = System.Drawing.Color.Red;
                        CheckStatus = 1;
                        if (CheckStatus == 1)
                        {
                            dataGridView1.Rows[i].Cells[12].Value.ToString();
                        }
                        failedCount++;
                    }
                }
                MessageBox.Show(successCount +" are correct & "+failedCount+" are incorrect file links in imported CSV file");
                
            }
            catch
            {
                MessageBox.Show("Fatal error");
                
            }
        }