Hi Martin,
The library browser is a Nevron Panel Bar the bands of which are instances of the NLibraryGroup class. Each library group couples a NLibraryDocument and NLibraryView. To disable drop on the libraries in a browser you need to set the AllowDrop property of each library view to false:
foreach (NLibraryGroup group in browser.Bands)
{
group.View.AllowDrop = false;
}
Best Regards,
Nevron Support Team