MVC entity framework Sql server bağlantısı

 ...
   <connectionStrings>
     <add name ="unvContext" connectionString ="Data Source=(LocalDb)\MSSQLLocalDB;AttachDbFileName=|DataDirectory|\universite.mdf;Initial Catalog=universite;Integrated Security=True" 
          providerName="System.Data.SqlClient" />
   </connectionStrings>
 ...
     <contexts>
       <context type="universite.DAL.unvContext, universite">
         <databaseInitializer type="universite.DAL.unvStartData, universite" />
       </context>
     </contexts>
 

 using System;
 using System.Collections.Generic;
 using System.Data.Entity;
 using System.Data.Entity.ModelConfiguration.Conventions;
 using System.Linq;
 using System.Web;
 using universite.Models;
 
 namespace universite.DAL
 {
     public class unvContext : DbContext
     {
         public unvContext() : base("unvContext")
         {
 
         }
 
         public DbSet<Ogrenci> Ogrenciler { get; set; }
         public DbSet<Kayit> Kayitlar { get; set; }
         public DbSet<Ders> Dersler { get; set; }
         protected override void OnModelCreating(DbModelBuilder modelBuilder)
         {
             modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
         }
     }
 
 }
 

 namespace universite.DAL
 {
     public class unvStartData:System.Data.Entity.DropCreateDatabaseIfModelChanges<unvContext>
     {
         protected override void Seed(unvContext context)
         {
             var Ogrenciler = new List<Ogrenci>
             {
                 // rasgele degerler atadim
                 new Ogrenci
                 {
                     Ad = "Ahmet", Soyad = "Yilmaz", DogumTarihi = DateTime.Parse("13-01-1997"),
                     EPosta = "ahmet@x.edu.tr"
                 },
                 new Ogrenci
                 {
                     Ad = "Ayse", Soyad = "Cetin", DogumTarihi = DateTime.Parse("13-05-1996"),
                     EPosta = "ahmet@x.edu.tr"
                 },
                 new Ogrenci
                 {
                     Ad = "Selma", Soyad = "Yildiz", DogumTarihi = DateTime.Parse("21-04-1995"),
                     EPosta = "selma@x.edu.tr"
                 },
                 new Ogrenci
                 {
                     Ad = "Hakan", Soyad = "Uysal", DogumTarihi = DateTime.Parse("17-07-1996"),
                     EPosta = "hakan@x.edu.tr"
                 },
                 new Ogrenci
                 {
                     Ad = "Sibel", Soyad = "Kartal", DogumTarihi = DateTime.Parse("18-12-1995"),
                     EPosta = "sibel@x.edu.tr"
                 }
             };
             Ogrenciler.ForEach(s => context.Ogrenciler.Add(s));
             context.SaveChanges();
 
             var Dersler = new List<Ders>
             {
                 new Ders
                 {
                     DersID = 203, DersAdi = "Mantik Devreleri", AKTS = 5
                 },
                 new Ders
                 {
                     DersID = 205, DersAdi = "Web Programlama", AKTS = 5
                 },
                 new Ders
                 {
                     DersID = 304, DersAdi = "Bilgisayar Aglari", AKTS = 5
                 }
             };
             Dersler.ForEach(s => context.Dersler.Add(s));
             context.SaveChanges();
 
             var Kayitlar = new List<Kayit>
             {
                 new Kayit
                 {
                     DersID = 203, OgrenciID = 1, BasariNotu=BasariNotlar.BA
                 },
                 new Kayit
                 {
                     DersID = 205, OgrenciID = 1, BasariNotu=BasariNotlar.CC
                 },
                 new Kayit
                 {
                     DersID = 208, OgrenciID = 1, BasariNotu=BasariNotlar.FF
                 }
             };
             Kayitlar.ForEach(s => context.Kayitlar.Add(s));
             context.SaveChanges();
         }
     }
 }