Selection Result Error: selection filter, select object on layer, layer name contains #

[Anonymous]

select object on layer, layer name contains # using following code, selection result got error

TypedValue[] tvs = new TypedValue[]
{
new TypedValue((int)DxfCode.Operator, "<and"),
new TypedValue((int)DxfCode.LayerName, layerName ), 
new TypedValue((int)DxfCode.Operator, "and>")
};
SelectionFilter filter = new SelectionFilter(tvs);
ObjectId[] objIds;
PromptSelectionResult psr = doc.Editor.SelectAll(filter);

please anyone can help

thank  you

@Anonymous Topic Title has been edited for better findability by the Community Manager, @Tiana_Y