How to use include function with repository pattern

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C#4.0

Hello gyes,
i have some problem in my repository pattern.

i want to fetch data including relational table...
how to do, i dont know..
please help me and modify my repository pattern
please...

//Context Class

public class InstituteContext : DbContext
    {
        public InstituteContext()
            : base("InstituteContext")
        {
            Database.SetInitializer(new DropCreateDatabaseIfModelChanges());
        }
        
        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            base.OnModelCreating(modelBuilder);
           //Map Student Table
            modelBuilder.Entity()
               .ToTable("tblstudent").Property(t => t.Id)
               .HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity)
               .HasColumnName("studentid");
            //Map Address Table
           modelBuilder.Entity<addressdetail>()
               .Ignore(i =&gt; i.AddedBy).Ignore(i =&gt; i.AddedDate).Ignore(i =&gt;                 i.ModifiedBy).Ignore(i =&gt; i.ModifiedDate)
               .HasRequired(t=&gt;t.StudentBasicDetail)
               .WithMany(a=&gt;a.AddressDetails)
               .HasForeignKey(k=&gt;k.StudentId)
               .WillCascadeOnDelete(false)
               .ToTable("tbladdress").Property(t =&gt; t.Id)               
               .HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity)
               .HasColumnName("addressid");
        }
    }

// Student Class

public class StudentBasicDetail : BaseEntity
    {        
        [Column("fullname")]
        public string FullName { get; set; }
            
        [Column("dob")]
        public DateTime? DateOfBirth { get; set; }

        [Column("gender")]
        public string Gender { get; set; }
       
        public virtual ICollection AddressDetails { get; set; }
    }


//Address Class

public class AddressDetail : BaseEntity
    {
        [Column("studentid")]
        public Int64 StudentId { get; set; }
        
        [Column("address")]
        public string Address { get; set; }        

        [Column("addresstype")]
        public AddressType AddressType { get; set; }

        public virtual StudentBasicDetail StudentBasicDetail { get; set; }
    }

// BaseEntity Class

public abstract class BaseEntity
    {
        [Key]
        public Int64 Id { get; set; }

        [Column("addeddate")]
        public DateTime? AddedDate { get; set; }

        [Column("addedby")]
        public string AddedBy { get; set; }

        [Column("modifieddate")]
        public DateTime? ModifiedDate { get; set; }

        [Column("modifiedby")]
        public string ModifiedBy { get; set; }
    }


// Repository Class

internal interface IRepository : IDisposable where T : class
    {
        void Add(T entity);
        void Update(T entity);
        void Delete(int id);
        int Save();
        //        
        IQueryable GetAll(Expression<func>&lt;t,&gt;&gt;[] include);
        T FindById(int id);
    }

    public abstract class Repository : IRepository where T : class
    {
        private InstituteContext _context;

        protected Repository(InstituteContext context)
        {
            _context = context;
        }       

        public void Dispose()
        {
            if (_context == null) return;
            _context.Dispose();
            _context = null;
        } 

        public virtual void Add(T t)
        {
           if (t != null)
               _context.Set().Add(t);
        }       

        public virtual void Update(T t)
        {
            if (t != null)
                _context.Entry(t).State = EntityState.Modified;
        }

        public virtual void Delete(int id)
        {
            var obj = FindById(id);
            _context.Set().Remove(obj);
        }        

        public virtual int Save()
        {
            var savecnt = _context.SaveChanges();               
            return savecnt;
        }

        public virtual IQueryable GetAll(params Expression&gt;[] includeExpressions)
        {
            var query = _context.Set().AsQueryable();
            return includeExpressions.Aggregate(query, (current, include) =&gt; current.Include(include));
        } 

        public virtual T FindById(int id)
        {
            return _context.Set().Find(id);
        }
    }


 public class InstituteRepository<t> : Repository<t> where T : class
    {
        public InstituteContext Context { get; private set; }
        public InstituteRepository(InstituteContext context)
            : base(context)
        {
            if (context == null)
            {
                throw new ArgumentNullException("context");
            }
            Context = context;
        }       
    }

Thanks & Regards
Manamohan

What I have tried:

I am trying...

using (var repo = new InstituteRepository<studentbasicdetail>(new InstituteContext()))
{
var srch=repo.GetAll();// here nothing show Like include table "AddressDetail"
}