Please change your method like below. You can only bind an Ienumerable collection to combobox
public bl_Campuses getCampusesList()
{
try
{
var q = DataAccess.metadata.db_Campus.Select(x=>new bl_Campuses{campusID = x.campusID,
Name = x.Name}).ToList();
return q;
}
catch (Exception e)
{
throw e;
}
}
Hope this helps