woking BLOBS with OLEDB

int PictureCol = 0;

OleDbConnection conn = new OleDbConnection("Provider=MSDAORA;Data Source=127.0.0.1;User ID=---;Password = ---");

OleDbCommand myCommand = new OleDbCommand("select photobrowse from mpho where username = 'tmac'",conn);

conn.Open();

OleDbDataReader dr = myCommand.ExecuteReader();
dr.Read();

Byte[] b = new Byte[(dr.GetBytes(PictureCol, 0, null, 0, int.MaxValue))];

dr.GetBytes(PictureCol, 0, b, 0, b.Length);
dr.Close();
conn.Close();

string DestFilePath = @"C:\lena2.bmp";
System.IO.FileStream fs = new System.IO.FileStream(DestFilePath, System.IO.FileMode.Create, System.IO.FileAccess.Write);
fs.Write(b, 0, b.Length);
fs.Close();