How about, Develop an application in VS 2013 and add a bootstrap template to my master page, the same code and the same template I did to develop a project in VS 2010 but it turns out that the nav navbar-nav pulldown menu does not work using the data-toggle="dropdown", in addition to this I had to comment on these lines that I think are the ones I need to include to the master page, comment them because VS 2010 gives error, but in VS 2013 no.
<%--<asp:ScriptReference Name="MsAjaxBundle" />
<asp:ScriptReference Name="jquery" />
<asp:ScriptReference Name="bootstrap" />
<asp:ScriptReference Name="respond" />--%>
master page code
<%@ Master Language="C#" AutoEventWireup="true" CodeBehind="Site.master.cs" Inherits="WebApplication.SiteMaster" %>
<%@ Register Assembly="DevExpress.Web.v14.2, Version=14.2.7.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a" Namespace="DevExpress.Web" TagPrefix="dx" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.SqlClient" %>
<%--<%@ Import Namespace="WebApplication.App_Code.Controladores" %>--%>
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="cc1" %>
<!DOCTYPE html>
<html lang="en">
<head id="Head1" runat="server">
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title><%: Page.Title %> - My ASP.NET Application</title>
<link rel="Shortcut Icon" href="images/favicon.ico" />
<link href="css/bootstrap.min.css" rel="stylesheet" type="text/css" />
<link href="css/custom.css" rel="stylesheet" type="text/css" />
<link rel="Shortcut Icon" href="images/favicon.ico" />
<link href="css/font-awesome.min.css" rel="stylesheet" type="text/css" />
<link href="http://maxcdn.bootstrapcdn.com/font-awesome/4.2.0/css/font-awesome.min.css"rel="stylesheet" type="text/css" />
<link href="http://fonts.googleapis.com/css?family=Lato:300,400,700,300italic,400italic,700italic" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="~/Scripts/jquery-1.10.2.js"></script>
<script type="text/javascript" src="~/Scripts/bootstrap.js"></script>
<script type="text/javascript" src="~/Scripts/bootstrap.min.js"></script>
</head>
<body style="background-image:url(Images/fondo.jpg); background-repeat: no-repeat; background-position: center; background-attachment: fixed"; >
<form id="Form1" runat="server">
<asp:ScriptManager ID="ScriptManager1" runat="server">
<Scripts>
<%--To learn more about bundling scripts in ScriptManager see http://go.microsoft.com/fwlink/?LinkID=301884 --%>
<%--Framework Scripts--%>
<%--<asp:ScriptReference Name="MsAjaxBundle" />
<asp:ScriptReference Name="jquery" />
<asp:ScriptReference Name="bootstrap" />
<asp:ScriptReference Name="respond" />--%>
<asp:ScriptReference Name="WebForms.js" Assembly="System.Web" Path="~/Scripts/WebForms/WebForms.js" />
<asp:ScriptReference Name="WebUIValidation.js" Assembly="System.Web" Path="~/Scripts/WebForms/WebUIValidation.js" />
<asp:ScriptReference Name="MenuStandards.js" Assembly="System.Web" Path="~/Scripts/WebForms/MenuStandards.js" />
<asp:ScriptReference Name="GridView.js" Assembly="System.Web" Path="~/Scripts/WebForms/GridView.js" />
<asp:ScriptReference Name="DetailsView.js" Assembly="System.Web" Path="~/Scripts/WebForms/DetailsView.js" />
<asp:ScriptReference Name="TreeView.js" Assembly="System.Web" Path="~/Scripts/WebForms/TreeView.js" />
<asp:ScriptReference Name="WebParts.js" Assembly="System.Web" Path="~/Scripts/WebForms/WebParts.js" />
<asp:ScriptReference Name="Focus.js" Assembly="System.Web" Path="~/Scripts/WebForms/Focus.js" />
<%--<asp:ScriptReference Name="WebFormsBundle" />--%>
<%--Site Scripts--%>
</Scripts>
</asp:ScriptManager>
<div class="container">
<div id="logo" >
<img id="Img1" runat="server" src="Images/logo.png" alt="Freshdesign" />
</div>
</div>
<nav class="navbar navbar-default" role="navigation" >
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
</div>
<div class="collapse navbar-collapse">
<%
//string dominio = System.Configuration.ConfigurationManager.AppSettings["dominio"].ToString();
%>
<ul class="nav navbar-nav">
<%--<li class="active"><a href="<%=dominio%>">Inicio</a></li>--%>
<li ><a id="A1" href="~/" runat="server">Incio</a></li>
<li > <a href="Pedido_Emergente/Pedido_Emergente.aspx" id="A2" runat="server"> Pedido Emergente</a></li>
<li id="Li1" class="dropdown" runat="server">
<a href="" runat="server" class="dropdown-toggle" data-toggle="dropdown" id="PedidoEmergente">Pedidos<b class="caret"></b></a>
<ul id="Ul1" class="dropdown-menu" runat="server">
<li>
<a href="Pedido_Emergente/Pedido_Emergente.aspx" id="Pedido"> Pedido Emergente</a>
</li>
</ul>
</li>
</ul>
<asp:LoginView ID="LoginView1" runat="server" ViewStateMode="Disabled">
<AnonymousTemplate>
<ul class="nav navbar-nav navbar-right">
<li><a id="A3" runat="server" href="~/Account/Login">Log in</a></li>
</ul>
</AnonymousTemplate>
<LoggedInTemplate>
<ul class="nav navbar-nav navbar-right">
<li><a id="A4" runat="server" href="~/Account/ChangeKey" title="Cambiio de clave">Conectado, <%="" %> !</a></li>
<li>
<asp:LoginStatus ID="LoginStatus1" runat="server" LogoutAction="Redirect" LogoutText="Salir" LogoutPageUrl="~/" OnLoggingOut="Unnamed_LoggingOut" />
</li>
</ul>
</LoggedInTemplate>
</asp:LoginView>
</div>
</div>
</nav>
<div class="container body-content">
<asp:ContentPlaceHolder ID="MainContent" runat="server">
</asp:ContentPlaceHolder>
<hr />
<footer>
<asp:UpdatePanel ID="updtePnlMensajes" runat="server">
<ContentTemplate>
<asp:Panel ID="pnlMensajes" runat="server" Height="60px" HorizontalAlign="Center"
Width="99%" BackColor="White" BorderColor="Silver" BorderStyle="Solid" BorderWidth="1px"
ScrollBars="auto">
<table>
<tr>
<td>
<asp:UpdateProgress ID="upgPrincipal" runat="server">
<ProgressTemplate>
Procesando...
<asp:Image ID="imgProgreso" runat="server" ImageUrl="~/Images/working.gif" />
</ProgressTemplate>
</asp:UpdateProgress>
</td>
</tr>
<tr>
<td>
<%--<asp:Label ID="lblMensaje" runat="server" Font-Bold="True" ForeColor="Red" />--%>
<div style=" width: 100%; text-align: center;">
<asp:Label ID="lblMsjError" runat="server" Font-Bold="True" ForeColor="Red" ></asp:Label>
</div>
</td>
</tr>
</table>
</asp:Panel>
<cc1:AlwaysVisibleControlExtender ID="avceMensajes" runat="server" TargetControlID="pnlMensajes"
HorizontalSide="Center" VerticalSide="Bottom" />
</ContentTemplate>
</asp:UpdatePanel>
<p>© <%: DateTime.Now.Year %> - ASP.NET Application</p>
</footer>
</div>
</form>