c# - join two repository pattern with getwithinclude method -

i learning unitofwork, repository pattern , in genericrepository file have method , not sure how use in real example.

/// <summary> /// include multiple /// </summary> /// <param name="predicate"></param> /// <param name="include"></param> /// <returns></returns> public iqueryable<tentity> getwithinclude(system.linq.expressions.expression<func<tentity, bool>> predicate, params string[] include) {     iqueryable<tentity> query = this.dbset;     query = include.aggregate(query, (current, inc) => current.include(inc));     return query.where(predicate); } 

for example if have 2 repositories rep1,rep2 foreignkey relationship join 2 repositories , output list, know how details single repository.

public ienumerable<crentity> getallcr() {     var mapper = createmapper();     var crall = _unitofwork.rep1.getall().tolist();     //var joinfd = _unitofwork.rep1.getwithinclude(); ---how add rep2 using getwithinclude     if (crall.any())     {         var crmodel = mapper.map<list<changerequest>, list<crentity>>(crall);         return crmodel;     }     return null; }