"adminButton.Visible = true;"
Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.


using System;
using System.Data;
using System.Configuration;
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 _Default : System.Web.UI.Page 
{    
    protected void adminButton_Click(object sender, EventArgs e)
    {
        Response.Write("hi");
    }

    protected void Page_Load(object sender, EventArgs e)
    {        
        if (!User.IsInRole("administrators"))
        {
            Button adminButton = (Button)LoginView1.FindControl("adminButton");                       
            adminButton.Visible = true;
        }
    }
}