ArcMapAddinVisibility.ViewModels.RLOSViewModel.GetLayerPath C# (CSharp) Method

        private static string GetLayerPath(ILayer layer)
        {
            if (layer is IRasterLayer)
            {
                IRasterLayer rlayer = layer as IRasterLayer;
                return rlayer.FilePath;
            }
            else if (layer is IMosaicLayer)
            {
                IMosaicLayer mlayer = layer as IMosaicLayer;
                return mlayer.FilePath;
            }

            return null;
        }