Hello, 

Is this how to limit file size wih fileupload control?

and how can I make it to accept file size above this limit and mae it accept file size of not more than 600kb?

if (FileUpload1.PostedFile.ContentLength < 102400)
{
    FileUpload1.SaveAs(Server.MapPath("~/img/") + FileUpload1.FileName);
    Label1.Text = "Image Uploaded Successfully !!";
}
else
{
    Label1.Text = "Image size must be less than 100kb";
}