This way
protected void UploadFile(object sender, EventArgs e)
{
using (FilesEntities entities = new FilesEntities())
{
tblFile file = new tblFile
{
Name = Path.GetFileName(fuUploadFile.PostedFile.FileName),
ContentType = fuUploadFile.PostedFile.ContentType,
Data = fuUploadFile.FileBytes,
};
entities.AddTotblFiles(file);
entities.SaveChanges();
}
}