Common Custom controls
CustomControls_CSharp\CustomControlsWeb\WebUserControl.ascx.cs
// Copyright 2011 ESRI
// 
// All rights reserved under the copyright laws of the United States
// and applicable international laws, treaties, and conventions.
// 
// You may freely redistribute and use this sample code, with or
// without modification, provided you include the original copyright
// notice and use restrictions.
// 
// See the use restrictions.
// 

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class WebUserControl : System.Web.UI.UserControl
{
    protected override void OnInit(EventArgs e)
    {
        base.OnInit(e);
        // Buddy the Map, MapResourceManager, Toc, and Toolbar
        Map1.MapResourceManager = this.MapResourceManager1.UniqueID;
        Toolbar1.BuddyControls.Add(new ESRI.ArcGIS.ADF.Web.UI.WebControls.BuddyControl(Map1.UniqueID));
        Toc1.BuddyControl = Map1.UniqueID;
    }

}