因为总是感觉，asp.net identity用起来不太舒服，比如代码的扩展性，以及维护以后的版本，所以对其进行分析
下面进入正文：
在vs2015自带的默认程序中，App_Start/IdentityConfig.cs，通过ApplicationUserManager Create函数开始分析，函数主要内容如下
public static ApplicationUserManager Create(IdentityFactoryOptions<ApplicationUserManager> options, IOwinContext context) { var manager = new ApplicationUserManager(new UserStore<ApplicationUser>(context.Get<ApplicationDbContext>())); .......... 可以得出,该函数初始化，新建ApplicationUserManager类（该类自身），传入一个新建UserStore泛型类，并给该UserStore泛型类通过查看该类定义得出，传入的为DbContext context参数而在Microsoft.AspNet.Identity.EntityFramework二进制dll中，UserStore新建用户的函数为
public async virtual Task CreateAsync(TUser user) { ((UserStore<TUser, TRole, TKey, TUserLogin, TUserRole, TUserClaim>) this).ThrowIfDisposed(); if (user == null) { throw new ArgumentNullException("user"); } ((UserStore<TUser, TRole, TKey, TUserLogin, TUserRole, TUserClaim>) this)._userStore.Create(user); await ((UserStore<TUser, TRole, TKey, TUserLogin, TUserRole, TUserClaim>) this).SaveChanges().WithCurrentCulture(); } 可以看到对数据库的操作关键在于_userStore.Create，而_userStore字段的初始化为， this._userStore = new EntityStore<TUser>(context);另外关于角色的管理，_roleStore字段为 this._roleStore = new EntityStore<TRole>(context);EntityStore泛型中，通过内部调用EntityFramework对数据库进行操作
public void Create(TEntity entity) { this.DbEntitySet.Add(entity); } 由此可知道，自己构建对数据库的操作，并和asp.net identity集成的方法
附上EntityStore的代码 namespace Microsoft.AspNet.Identity.EntityFramework { using System; using System.Data.Entity; using System.Linq; using System.Runtime.CompilerServices; using System.Threading.Tasks; internal class EntityStore<TEntity> where TEntity: class { public EntityStore(DbContext context) { this.Context = context; this.DbEntitySet = context.Set<TEntity>(); } public void Create(TEntity entity) { this.DbEntitySet.Add(entity); } public void Delete(TEntity entity) { this.DbEntitySet.Remove(entity); } public virtual Task<TEntity> GetByIdAsync(object id) { return this.DbEntitySet.FindAsync(new object[] { id }); } public virtual void Update(TEntity entity) { if (entity != null) { this.Context.Entry<TEntity>(entity).State = EntityState.Modified; } } public DbContext Context { get; private set; } public DbSet<TEntity> DbEntitySet { get; private set; } public IQueryable<TEntity> EntitySet { get { return this.DbEntitySet; } } }
