Hello,
Please see the below master page code, Hope this will help you
<%@ Master Language="C#" AutoEventWireup="true" CodeFile="Site.master.cs" Inherits="SiteMaster" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head runat="server">
<title></title>
<link href="~/Styles/Site.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div>
<table width="100%">
<tr>
<%-- For left navigation--%>
<td style="width: 30%" valign="top">
left navigatin pane
<asp:Menu ID="Menu1" runat="server" BackColor="#B5C7DE"
DynamicHorizontalOffset="2" Font-Names="Verdana" Font-Size="0.8em"
ForeColor="#284E98" StaticSubMenuIndent="10px">
<DynamicHoverStyle BackColor="#284E98" ForeColor="White" />
<DynamicMenuItemStyle HorizontalPadding="5px" VerticalPadding="2px" />
<DynamicMenuStyle BackColor="#B5C7DE" />
<DynamicSelectedStyle BackColor="#507CD1" />
<Items>
<asp:MenuItem Text="Menu1" Value="Menu1"></asp:MenuItem>
<asp:MenuItem Text="Menu2" Value="Menu2"></asp:MenuItem>
<asp:MenuItem Text="Menu3" Value="Menu3"></asp:MenuItem>
<asp:MenuItem Text="Menu4" Value="Menu4"></asp:MenuItem>
</Items>
<StaticHoverStyle BackColor="#284E98" ForeColor="White" />
<StaticMenuItemStyle HorizontalPadding="5px" VerticalPadding="2px" />
<StaticSelectedStyle BackColor="#507CD1" />
</asp:Menu>
</td>
<%--For content place holder--%>
<td style="width: 70%">
<asp:ContentPlaceHolder ID="ContentPlaceHolder1" runat="server">
</asp:ContentPlaceHolder>
</td>
</tr>
</table>
<br />
<br />
</div>
</body>
</html>
Thanks!!!!!!!!!