c# don't scroll up after onclick code example

Example: c# don't scroll up after onclick

MaintainScrollPositionOnPostback="true"
  
  add this in top of aspx fil
  
<%@ Page Title="" Language="C#" MasterPageFile="~/MasterPage.master" AutoEventWireup="true" CodeFile="menukort.aspx.cs"  MaintainScrollPositionOnPostback="true" %>