Запись и чтение изображение из БД и в БД

using(myStream)
				{
					string filename = dlg.FileName;
    				FileNameTextBox.Text = filename;
    				
    				Byte[] imageBytes = new byte[myStream.Length];  
					myStream.Read(imageBytes, 0, imageBytes.Length);
					
					//using bd
					OdbcConnection connection = new OdbcConnection("DRIVER={MySQL ODBC 5.1 Driver};" +"SERVER=localhost;"+"DATABASE=sss;" +"UID=sss;" +"PASSWORD=199011;" +"OPTION=3");
					connection.Open();
					OdbcCommand cmd = new OdbcCommand("insert into user (pass) VALUES ('"+ myStream +"');");
					cmd.Connection = connection;
					cmd.ExecuteNonQuery();
    				
    				
					cmd.CommandText = "SELECT avatar FROM user ORDER BY id DESC LIMIT 1;";
					cmd.Connection = connection;
					OdbcDataReader dr = cmd.ExecuteReader();
					dr.Read();
					
					blob = new Byte[(dr.GetBytes(0, 0, null, 0, int.MaxValue))];
					dr.GetBytes(0, 0, blob, 0, blob.Length);
 					dr.Close();
 					connection.Close();
 					
 					fs = new FileStream( @"z:\\MyTest.txt", FileMode.Create, FileAccess.Write); 
 					fs.Write(blob, 0, blob.Length);
 					fs.Close();


					
					
				}