This is for reloading the current page. I used it for after comment the page.
Page.Response.Redirect(Page.Request.Url.ToString(), true);
protected void btn_insertComment_Click(object sender, EventArgs e)
{
SqlCommand cmd = new SqlCommand("insert into Comment(commentNameSurname,commentEmail,commentContent,commentPicture,articleId) Values('" + txt_NameSurname.Text + "','" + txt_Email.Text + "', '" + txt_Comment.Text + "','/theme/comment.png', '" + articleId + "')", connect.connect());
cmd.ExecuteNonQuery();
SqlCommand cmdInsert = new SqlCommand("Update Article Set articleNumOfComment = articleNumOfComment+1 where makaleId='" + articleId + "'", connect.connect());
cmdInsert.ExecuteNonQuery();
lbl_info.Text = "It has done";
txt_NameSurname.Text = "";
txt_Email.Text = "";
txt_Comment.Text = "";
Page.Response.Redirect(Page.Request.Url.ToString(), true); //sayfa yenilensin diye
}