Hi, I'm attempting to write a Razor script by having a issue when a Node has been deleted by the reference still exists within a node property.

Using Library.NodeById(<Id>) I get an exception

System.NullReferenceException: Object reference not set to an instance of an object.
   at umbraco.MacroEngines.ExamineBackedMedia.GetUmbracoMedia(Int32 id)
   at umbraco.MacroEngines.DynamicBackingItem..ctor(Int32 Id)
   at umbraco.MacroEngines.DynamicNode..ctor(Int32 NodeId)
   at umbraco.MacroEngines.Library.RazorLibraryCore.NodeById(Int32 Id)
   at ASP._Page_macroScripts_ProductCategorySidebar_cshtml.Execute()

Is there a method that exists to check if the node exists instead of enclosing within a try catch to avoid the exception stopping the render?

For a temporay fix I have added the code below as a function. I start from -1 as the object I require exist within a Global section in the node tree where I hold Banners, Promotions etc for better site structuring.

    public dynamic GetNodeById (int Id)
    {
        DynamicNodeList colNodes = ((DynamicNode)Library.NodeById(-1)).Descendants(n => n.Id == Id);        

        if (colNodes != null && 
            colNodes.Items.Count != 0)
        {
            return colNodes.Items[0] as dynamic;
        }

        return null;
    }

Thanks Andy