Upload file into Database

   i tried this,this working fine,is this right? 

PersistenceManager PM = PersistenceManager.DefaultManager;

EntityList<ImageUpload> ListDatas = new EntityList<ImageUpload>();

private void bindingNavigatorAddNewItem_Click(object sender, EventArgs e)

{
ListDatas.Add(ImageUpload.Create(PM));

bsFile.MoveLast();
}
private void Form1_Load(object sender, EventArgs e)

{
ListDatas.ReplaceRange(PM.GetEntities<ImageUpload>());

bsFile.DataSource = ListDatas;
}
OpenFileDialog openFileDialog1 = new OpenFileDialog();

private void SelectFileultraButton_Click(object sender, EventArgs e)

{
openFileDialog1.Filter = "All Files (*.*)|*.*";

openFileDialog1.Title = "Select File";

if (DialogResult.Cancel == openFileDialog1.ShowDialog())

{
return;

}
fileNameUltraTextEditor.Text = openFileDialog1.FileName;
string fileName = Path.GetFileName(fileNameUltraTextEditor.Text.ToString());

byte[] content = ReadFileToByteArray(fileName);

ImageUpload CurrentFile = bsFile.Current as ImageUpload;

CurrentFile.File= content;
CurrentFile.FileName = fileName;
}
protected static byte[] ReadFileToByteArray(string fileName)

{
FileStream fileStream = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.Read);

long len;

len = fileStream.Length;
Byte[] fileAsByte = new Byte[len];

fileStream.Read(fileAsByte, 0, fileAsByte.Length);
MemoryStream memoryStream = new MemoryStream(fileAsByte);

return memoryStream.ToArray();

}
private void saveToolStripButton_Click(object sender, EventArgs e)

{
if (PM.HasChanges())

{
try

{
PM.SaveChanges();
MessageBox.Show("Sucessfully saved");

}
catch (Exception ex)

{
MessageBox.Show(ex.Message.ToString());

}
}
else

{
MessageBox.Show("Nothing to save");

}
}
private void RetriveultraButton_Click(object sender, EventArgs e)

{
string fileName = string.Empty;

byte[] content = null;

ImageUpload CurrentFile = bsFile.Current as ImageUpload;

fileName = CurrentFile.FileName;
content = CurrentFile.File;
DirectoryInfo di = new DirectoryInfo("C:\\Test");

if (di.Exists == false)

{
di.Create();
}
FileStream fs = new FileStream(di + "\\" + fileName, FileMode.Create);

fs.Write(content, 0, System.Convert.ToInt32(content.Length));

fs.Seek(0, SeekOrigin.Begin);

fs.Close();
}