To prevent After saving on button click on refresh button saving data - ASP.NET C#

<asp:ScriptManager ID="ScriptManager1" runat="server">

</asp:ScriptManager>

<asp:UpdatePanel ID="UpdatePanel1" runat="server">

     <ContentTemplate>            

           <asp:Label ID="Label1" runat="server" Text=""></asp:Label><br />

           <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />      

     </ContentTemplate>

</asp:UpdatePanel>

reference:-  https://www.aspsnippets.com/questions/184293/Prevent-Page-refresh-on-Button-Click-in-ASPNet/