How to get files from multiple directories and displaying it in a datagridview?

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C#3.0

C#

As stated in the questions. I want to read files from multiple directories and display all of it in a single datagridview. I've found one that having the same problem but that one is using List<>.AddRange to get the directories while I'm using string[]. Please help. Here is my code snippet to fetch the directory and files :

s1 = Directory.GetFiles(@"C:\Documents and Settings\Administrator\Desktop\FILE\7", "*.*");

and this is for reading it and filling it in a datagridview :

for (int i = 0; i <= s1.Length - 1; i++)
        {

            try
            {
                if (i == 0)
                {
                    dt.Columns.Add("File_Name");
                    dt.Columns.Add("File_Type");
                    dt.Columns.Add("File_Size");
                    dt.Columns.Add("Create_Date");
                }

                FileInfo info = new FileInfo(s1[i]);
                FileSystemInfo sysInfo = new FileInfo(s1[i]);
                dr = dt.NewRow();

                dr["File_Name"] = sysInfo.Name;
                dr["File_Type"] = sysInfo.Extension;
                dr["File_Size"] = (info.Length / 1024).ToString();
                dr["Create_Date"] = sysInfo.CreationTime.Date.ToString("dd/MM/yyyy");
                dt.Rows.Add(dr);


                if ((info.Length / 1024) > 1500000)
                {
                    MessageBox.Show("" + sysInfo.Name + " had reach its size limit.");
                }



                if (dt.Rows.Count > 0)
                {
                    dataGridView1.DataSource = dt;
                }
            }
            catch (UnauthorizedAccessException ex)
            {
                MessageBox.Show("Error : " + ex.Message);
                continue;
            }
        }

   }