How to release a raster file from locking after deleting it's layer from arcmap using arcobjects

[ShehabAhmed2]

I'm creating an addin in which I need to delete the raster file after deleting it's layer from the current map.

The layer is deleted no problem.

ArcMap.Document.FocusMap.DeleteLayer(layerToRemove);

ArcMap.Document.UpdateContents();

ArcMap.Document.ActiveView.Refresh();

Marshal.FinalReleaseComObject(layerToRemove);

The issue is this: when I try to delete the source file, it gives me IO exception that is the file is in use with arcmap process.

Any help will be appreciated.

[ShehabAhmed2 · Accepted solution]

Actually after asking a friend , the perfect working solution is to use the Arcmap delete tool