how to stop refreshing contents of master page in asp.net

i am having one master in that i placed one treeview control.sub treeview nodes is redirected to another webpages while selecting subtreview nodes it is refreshing master page also

how to stop refreshing master page and i want only change web page in content place

billow my code

master page code:

<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Entarchy.master.cs" Inherits="BondEnvironmentInfo.Entarchy" %>

BondDashboard

<%--

--%>



<%----%>	<%----%></div><div id="pastingspan1"> <asp:UpdatePanel ID="UpdatePanel1" runat="server" UpdateMode="Conditional" RenderMode="Block"></div><div id="pastingspan1"> <ContentTemplate></div><div id="pastingspan1"> <%--<asp:UpdatePanel ID="Updatepannel1" runat="server"></div><div id="pastingspan1"> <ContentTemplate>--%></div><div id="pastingspan1"> <asp:ContentPlaceHolder ID="MainContent" runat="server"></div><div id="pastingspan1"> </asp:ContentPlaceHolder></div><div id="pastingspan1"> </ContentTemplate></div><div id="pastingspan1"> <Triggers></div><div id="pastingspan1"> <asp:AsyncPostBackTrigger ControlID="TreeView2" /></div><div id="pastingspan1"> </Triggers></div><div id="pastingspan1"> </asp:UpdatePanel></div><div id="pastingspan1"> </div></div><div id="pastingspan1"> </td></div><div id="pastingspan1"> </tr></div><div id="pastingspan1"> <tr></div><div id="pastingspan1"> <td colspan="3" id="ThemeBar1" class="clsThemeBar" width="100%"></td></div><div id="pastingspan1"> </tr></div><div id="pastingspan1"> </table></div><div id="pastingspan1"> </div></div><div id="pastingspan1"> </form></div><div id="pastingspan1"></body></div><div id="pastingspan1"></html></div><div style="font-family: Roboto, sans-serif;"></div><font face="Roboto, sans-serif">dev.aspx:</font></div><div><div id="pastingspan1"><%@ Page Language="C#" AutoEventWireup="true" CodeBehind="DEV1.aspx.cs" Inherits="BondEnvironmentInfo.DEV1" MasterPageFile="~/Entarchy.Master" %></div><div id="pastingspan1"></div><div id="pastingspan1"><asp:Content ID="Content1" ContentPlaceHolderID="MainContent" runat="Server"></div><div id="pastingspan1"></div><div id="pastingspan1"> <p></div><div id="pastingspan1"> <asp:Label ID="lbld" runat="server"></asp:Label></div><div id="pastingspan1"> </p></div><div id="pastingspan1"></div><div id="pastingspan1"></asp:Content></div><div></div>Please can you tell me how to do without refreshing whole master page ,refresh only content page </div><div> </div><div>Thanks in advance </div></div></article><section class="comments" id="replies"><header class="comments-head"><span class="comments-badge" aria-hidden="true"><svg xmlns="http://www.w3.org/2000/svg" width="19" height="19" viewBox="0 0 16 16" fill="none" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true" focusable="false"><path d="M3 3h10a2 2 0 0 1 2 2v4.5a2 2 0 0 1-2 2H7.5L4 14.5V11.5H3a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2z"></path></svg></span><div><h2 class="comments-title">1 Reply</h2><p class="comments-sub">Know the answer? Post it — somebody with the same question will find it here.</p></div></header><div class="comment-signin"><span class="comment-signin-badge" aria-hidden="true"><svg viewBox="0 0 20 20" fill="none" stroke="currentColor" stroke-width="1.6"><path d="M11.5 3.5h3.2a1 1 0 0 1 1 1v11a1 1 0 0 1-1 1h-3.2" stroke-linecap="round"></path><path d="M4.5 10h7" stroke-linecap="round"></path><path d="M8.8 7.2 11.6 10l-2.8 2.8" stroke-linecap="round" stroke-linejoin="round"></path></svg></span><div class="comment-signin-body"><p class="comment-signin-title">Sign in to <!-- -->answer this question</p><p class="comment-signin-text">It is the same account you read, post and publish with — and you will come straight back to this page.</p></div><div class="comment-signin-actions"><a class="btn primary-btn comment-signin-btn" href="/login?returnurl=%2Fforums%2Fhow-to-stop-refreshing-contents-of-master-page-in-asp-net">Sign in</a><a class="comment-signin-alt" href="/register?returnurl=%2Fforums%2Fhow-to-stop-refreshing-contents-of-master-page-in-asp-net">Create an account</a></div></div><ul class="comment-list"><li class="comment-thread"><article class="comment"><a class="comment-photo-link" href="/members/akshay-phadke" title="Akshay Phadke"><img class="comment-photo" src="https://cdn.c-sharpcorner.com/uploadfile/authorimage/5a9b6120160620012903.webp" alt="Akshay Phadke" title="Akshay Phadke" loading="lazy" data-avatar-name="Akshay Phadke" referrerPolicy="no-referrer"/></a><div class="comment-main"><div class="comment-head"><p class="comment-byline"><a href="/members/akshay-phadke" class="comment-author">Akshay Phadke</a><span class="posted-when" tabindex="0"><time class="posted-when-value comment-time" dateTime="2016-08-29T03:19:45.993Z">10y<!-- --> ago</time><span class="posted-when-pop" role="tooltip"><span>Posted<!-- --> <!-- -->Aug 29, 2016, 3:19 AM</span></span></span></p></div><div class="article-body"><div>As from your code palce the code in update panel in your aspx page that will stop refreshing your Page when you write any code in aspx page inherit the master page and place the entire code in Update Panel for more on update panel refer this URL </div><div> </div><div>http://www.asp.net/web-forms/overview/older-versions-getting-started/aspnet-ajax/understanding-asp-net-ajax-updatepanel-triggers </div></div><div class="comment-foot"><span class="reply-vote"><a href="/login?returnurl=%2Fforums%2Fhow-to-stop-refreshing-contents-of-master-page-in-asp-net" class="reply-vote-btn reply-vote-up" title="Sign in to vote up" aria-label="Vote up"><svg width="14" height="14" viewBox="0 0 16 16" fill="currentColor" aria-hidden="true"><path d="M8 2.5 14.5 12h-13z"></path></svg></a><span class="reply-vote-score" title="0 up, 0 down">0</span><a href="/login?returnurl=%2Fforums%2Fhow-to-stop-refreshing-contents-of-master-page-in-asp-net" class="reply-vote-btn reply-vote-down" title="Sign in to vote down" aria-label="Vote down"><svg width="14" height="14" viewBox="0 0 16 16" fill="currentColor" aria-hidden="true"><path d="M8 13.5 1.5 4h13z"></path></svg></a></span></div></div></article></li></ul></section></div></div><script>$RS=function(a,b){a=document.getElementById(a);b=document.getElementById(b);for(a.parentNode.removeChild(a);a.firstChild;)b.parentNode.insertBefore(a.firstChild,b);b.parentNode.removeChild(b)};$RS("S:2","P:2")</script><script>$RB=[];$RV=function(a){$RT=performance.now();for(var b=0;b<a.length;b+=2){var c=a[b],e=a[b+1];null!==e.parentNode&&e.parentNode.removeChild(e);var f=c.parentNode;if(f){var g=c.previousSibling,h=0;do{if(c&&8===c.nodeType){var d=c.data;if("/$"===d\|\|"/&"===d)if(0===h)break;else h--;else"$"!==d&&"$?"!==d&&"$~"!==d&&"$!"!==d&&"&"!==d\|\|h++}d=c.nextSibling;f.removeChild(c);c=d}while(c);for(;e.firstChild;)f.insertBefore(e.firstChild,c);g.data="$";g._reactRetry&&requestAnimationFrame(g._reactRetry)}}a.length=0}; $RC=function(a,b){if(b=document.getElementById(b))(a=document.getElementById(a))?(a.previousSibling.data="$~",$RB.push(a,b),2===$RB.length&&("number"!==typeof $RT?requestAnimationFrame($RV.bind(null,$RB)):(a=performance.now(),setTimeout($RV.bind(null,$RB),2300>a&&2E3<a?2300-a:$RT+300-a)))):b.parentNode.removeChild(b)};$RC("B:1","S:1")</script><div style="display:none" id="S:3"></div><script>$RC("B:3","S:3")</script><div style="display:none" id="S:0"></div><script>$RC("B:0","S:0")</script></body></html>