Layer Unique Id

Idea created by 1_sjchen1 on Mar 31, 2010
    Implemented
    Score330

    Currently, we search a layer by name by looping through TOC to find the target layer.  However, layer name is not a unique id for the layer and it could be duplicate in different layers.  It would be great if ESRI could provide a layer unique identifier that application can keep the unique identifier and find the layer right away.