how to search in array list

i need to compare string value in  stored value in arrayList.if it find that value then method should return true.how to do it ?my following code is not working :


bool screen = Utilities.screenValidate("ConsignmentListPrice.aspx");
        if (screen == false)
        {
            Response.Redirect("../WebPages/FrmHome.aspx", false);
       
        }

in utilities class:

public static bool screenValidate(string screenName)
    {

   
       
        ArrayList validScreen = (ArrayList)HttpContext.Current.Session["ScreenName"];
        validScreen.BinarySearch(screenName);
        return true;
            }Start Free Trial