c# - How can I generically .Include properties of entities limited to a certain class? -

i using entity framework 6.x t4 templates generate both dbcontext , entity classes .edmx. of entities inherit class called baseentity. take example following sample entity:

public partial class userentity : baseentity {     [identitycolumn]     public int id  { get; set; }     public string name { get; set; }     public int fkuserlocationid { get; set; }      [navigationcolumn]     public virtual icollection<userrole> userroles { get; set; }        [navigationcolumn]     public virtual userlocation userlocation { get; set; } } 

userrole , userlocation inherit baseentity. have generic repository interface igenericrepository<tentity> tentity : baseentity , implementation of genericrepository<tentity> tentity: baseentity:

public class genericrepository<tentity> : igenericrepository<tentity> tentity : baseentity {     protected readonly mydbcontext _context;     protected readonly dbset<t> _dbset;      public genericrepository(mydbcontext context) {         _context = context;         _dbset = context.set<t>();     }      //would limit object of type baseentity or icollection<baseentity>     public iqueryable<tentity> get(params expression<func<tentity, object>>[] includeproperties)     {         var query = _dbset.asqueryable();         foreach (var include in includeproperties){             query = query.include(include);         }          return query;     } } 

with of that, able include entities doing like:

//assume repository exists _userrepository.get(user => user.userroles, user => user.userlocation); //valid include _userrepository.get(user => user.name); //invalid include appears in intellisense 

how can correctly define method that baseentity properties (or properties navigationcolumn attribute) valid in func?

public class genericrepository<tentity> : igenericrepository<tentity> tentity : baseentity {     protected readonly mydbcontext _context;     protected readonly dbset<t> _dbset;      public genericrepository(mydbcontext context) {         _context = context;         _dbset = context.set<t>();     }      //would limit object of type baseentity or icollection<baseentity>     public iqueryable<tentity> get(params expression<func<tentity, object>>[] includeproperties)     {         var query = _dbset.asqueryable(); //something may help? wont solve issue of intelisense knowing allowed , not allowed.           includeproperties = includeproperties.where(p=>p.type.declaringtype.getcustomattributes(typeof(navigationproperty),true).any());          foreach (var include in includeproperties){             query = query.include(include);         }          return query;     } }