'yield return' statement can't appear in try/catch block constraint [duplicate]

Answer 1

   public static IEnumerable IListFind(IEnumerable list, ConditionHandler handler, EventHandler errorHandler = null, DateTime? started = null)
    {
        try
        {
            if (started == null) { started = DateTime.Now; };
            return IListFindInternal(list, handler);
        }
        catch
        {
            if (DateTime.Now.Subtract(started.Value).TotalSeconds < 30)
            {
                if (errorHandler != null) { errorHandler(list, EventArgs.Empty); };
                return IListFind(list, handler, errorHandler, started);
            }
            else
            {
                return null;
            }
        }
    }

    public static IEnumerable IListFindInternal(IEnumerable list, ConditionHandler handler) { foreach (object item in list) { if (handler(item)) { yield return item; } } }