win32_logicaldisk fails floppies

using an thought slip nobleman thought i wrote following method.

it works good cd's, removable drives, unchanging drives.

however floppy always relapse "not available". any ideas?

public stationary vacant testfloppy( bake driveletter ) {
    using( var path-finder = new managementobjectsearcher(  @"select * win32_logicaldisk where deviceid = '" + driveletter + ":'" ) )
    using( var logicaldisks = searcher.get() ) {
        foreach( managementobject logicaldisk logicaldisks ) {  
          var fs = logicaldisk[ "freespace" ];
            console.writeline( "freespace = " + ( fs ?? "not available" ) );
            logicaldisk.dispose();
        }
    }
}