c# 4.0 - retrieve image from MS Access -

i want retrieve image ms access database showing in picturebox code code this:

private void button1_click(object sender, eventargs e)     {         oledbconnection myconnection = new oledbconnection(configurationmanager.connectionstrings["connectionstring"].connectionstring);          myconnection.open();         oledbcommand cmd = new oledbcommand("select * [images] id=1", myconnection);         oledbdataadapter da = new oledbdataadapter(cmd);         datatable dt = new datatable();         da.fill(dt);          if (dt.rows.count > 0)         {             if (dt.rows[0]["aimage"] != dbnull.value)             {                 picturebox.image = bytearraytoimage((byte[])dt.rows[0]["aimage"]);             }         }         myconnection.close();         }      bitmap bytearraytoimage(byte[] b)     {         memorystream ms = new memorystream();         byte[] pdata = b;         ms.write(pdata, 0, convert.toint32(pdata.length));         bitmap bm = new bitmap(ms, false);         ms.dispose();         return bm;     } 

but there error like:"parameter not valid." bitmap bm = new bitmap(ms, false); don't know why?

from msdn documentation bitmap constructor: bitmap(stream, boolean)

a system.argumentexception thrown if:

stream not contain image data or nothing.

-or-

stream contains png image file single dimension greater 65,535 pixels.

and

remarks

you must keep stream open lifetime of bitmap.

due limitation of gdi+ decoder, system.argumentexception thrown if construct bitmap .png image file single dimension greater 65,535 pixels.

have checked properties of image retrieving access database see if describes error situation?