c# - Is it possible to create a generic Repository class for all my objects? -

i have following poco class repository pattern implementation. if model big enough make sense make generic 1 implementation needs done.

is possible? can please show me how?

 public class position     {         [databasegenerated(system.componentmodel.dataannotations.databasegeneratedoption.identity)]            public int positionid { get; set; }         [stringlength(20, minimumlength=3)]         public string name { get; set; }         public int yearsexperiencerequired { get; set; }         public virtual icollection<applicantposition> applicantposition { get; set; }     }   public interface ipositionrepository     {         void createnewposition(position contacttocreate);         void deleteposition(int id);         position getpositionbyid(int id);         ienumerable<position> getallpositions();         int savechanges();         ienumerable<position> getpositionbycustomexpression(expression<func<position, bool>> predicate);      }  public class positionrepository : ipositionrepository     {          private hrcontext _db = new hrcontext();          public positionrepository(hrcontext context)         {             if (context == null)                 throw new argumentnullexception("context");             _db = context;         }             public position getpositionbyid(int id)         {             return _db.positions.firstordefault(d => d.positionid == id);         }          public ienumerable<position> getallposition()         {             return _db.positions.tolist();         }          public void createnewposition(position positiontocreate)         {             _db.positions.add(positiontocreate);             _db.savechanges();         }          public int savechanges()         {             return _db.savechanges();         }          public void deleteposition(int id)         {             var postodel = getpositionbyid(id);             _db.positions.remove(postodel);             _db.savechanges();         }          /// <summary>         /// lets suppose have field called name, years of experience, , department.         /// how can create generic way in 1 simple method allow caller of method pass         /// 1, 2 or 3 parameters.         /// </summary>         /// <returns></returns>         public ienumerable<position> getpositionbycustomexpression(expression<func<position, bool>> predicate)         {             return _db.positions.where(predicate);          }          private bool disposed = false;          protected virtual void dispose(bool disposing)         {             if (!this.disposed)             {                 if (disposing)                 {                     _db.dispose();                 }             }             this.disposed = true;         }          public void dispose()         {             dispose(true);             gc.suppressfinalize(this);         }     } 

yes, can here one:

using system; using system.collections.generic; using system.linq; using system.text; using system.data.entity; using system.data;  namespace nodes.data.repository {     public class baserepository<tentity>:irepository<tentity> tentity : class     {         internal sampledbcontext context;         internal dbset<tentity> dbset;          public baserepository(sampledbcontext context)         {             this.context = context;             this.dbset = context.set<tentity>();         }          public virtual tentity getbyid(object id)         {             return dbset.find(id);         }          public virtual void insert(tentity entity)         {             dbset.add(entity);          }          public virtual void delete(object id)         {             tentity entitytodelete = dbset.find(id);             delete(entitytodelete);         }          public virtual void deleteall(list<tentity> entities)         {             foreach (var entity in entities)             {                 this.delete(entity);             }         }          public virtual void delete(tentity entitytodelete)         {             if (context.entry(entitytodelete).state == entitystate.detached)             {                 dbset.attach(entitytodelete);             }             dbset.remove(entitytodelete);         }          public virtual void update(tentity entitytoupdate)         {             dbset.attach(entitytoupdate);             context.entry(entitytoupdate).state = entitystate.modified;         }          public iqueryable<tentity> find(system.linq.expressions.expression<func<tentity, bool>> predicate)         {             return dbset.where(predicate);         }     } } 

unitofwork:

public class unitofwork     {         private sampledbcontext context = new sampledbcontext();          private iuserrepository userrepository;          #region publicproperties          public iuserrepository userrepository         {                         {                 if (this.userrepository == null)                 {                     userrepository repo = new userrepository(context);                 }                 return userrepository;             }         }          #endregion          public void save()         {             context.savechanges();         }          private bool disposed = false;          protected virtual void dispose(bool disposing)         {             if (!this.disposed)             {                 if (disposing)                 {                     context.dispose();                 }             }             this.disposed = true;         }          public void dispose()         {             dispose(true);             gc.suppressfinalize(this);         }     } 

link download template project wrote.
http://amrelgarhy.com/wp-content/uploads/2011/10/treenodeswebsitetemplate_v1.zip