"Microsoft.AspNetCore.Identity.EntityFrameworkCore": "1.1.0",

public class ApplicationRoleStore :
     RoleStore<Role, ApplicationDbContext, int, UserRole, RoleClaim>,
     IApplicationRoleStore

public ApplicationRoleStore(
   IUnitOfWork uow,
   IdentityErrorDescriber describer = null)
   : base((ApplicationDbContext)uow, describer)

        protected override RoleClaim CreateRoleClaim(Role role, Claim claim)
        {
            return new RoleClaim
            {
                RoleId = role.Id,
                ClaimType = claim.Type,
                ClaimValue = claim.Value
            };
        }

 services.AddScoped<IUnitOfWork, ApplicationDbContext>();

services.AddScoped<IApplicationRoleStore, ApplicationRoleStore>();
services.AddScoped<RoleStore<Role, ApplicationDbContext, int, UserRole, RoleClaim>, ApplicationRoleStore>();

public class ApplicationRoleManager :
    RoleManager<Role>,
    IApplicationRoleManager

public ApplicationRoleManager(
            IApplicationRoleStore store,
            IEnumerable<IRoleValidator<Role>> roleValidators,
            ILookupNormalizer keyNormalizer,
            IdentityErrorDescriber errors,
            ILogger<ApplicationRoleManager> logger,
            IHttpContextAccessor contextAccessor,
            IUnitOfWork uow) :
            base((RoleStore<Role, ApplicationDbContext, int, UserRole, RoleClaim>)store, roleValidators, keyNormalizer, errors, logger, contextAccessor)

services.AddScoped<IApplicationRoleManager, ApplicationRoleManager>();
services.AddScoped<RoleManager<Role>, ApplicationRoleManager>();

public class ApplicationUserStore :
   UserStore<User, Role, ApplicationDbContext, int, UserClaim, UserRole, UserLogin, UserToken, RoleClaim>,
   IApplicationUserStore

public ApplicationUserStore(
   IUnitOfWork uow,
   IdentityErrorDescriber describer = null)
   : base((ApplicationDbContext)uow, describer)

        protected override UserClaim CreateUserClaim(User user, Claim claim)
        {
            var userClaim = new UserClaim { UserId = user.Id };
            userClaim.InitializeFromClaim(claim);
            return userClaim;
        }

        protected override UserLogin CreateUserLogin(User user, UserLoginInfo login)
        {
            return new UserLogin
            {
                UserId = user.Id,
                ProviderKey = login.ProviderKey,
                LoginProvider = login.LoginProvider,
                ProviderDisplayName = login.ProviderDisplayName
            };
        }

        protected override UserRole CreateUserRole(User user, Role role)
        {
            return new UserRole
            {
                UserId = user.Id,
                RoleId = role.Id
            };
        }

        protected override UserToken CreateUserToken(User user, string loginProvider, string name, string value)
        {
            return new UserToken
            {
                UserId = user.Id,
                LoginProvider = loginProvider,
                Name = name,
                Value = value
            };
        }

services.AddScoped<IApplicationUserStore, ApplicationUserStore>();
services.AddScoped<UserStore<User, Role, ApplicationDbContext, int, UserClaim, UserRole, UserLogin, UserToken, RoleClaim>, ApplicationUserStore>();

public class ApplicationUserManager :
   UserManager<User>,
   IApplicationUserManager

public ApplicationUserManager(
            IApplicationUserStore store,
            IOptions<IdentityOptions> optionsAccessor,
            IPasswordHasher<User> passwordHasher,
            IEnumerable<IUserValidator<User>> userValidators,
            IEnumerable<IPasswordValidator<User>> passwordValidators,
            ILookupNormalizer keyNormalizer,
            IdentityErrorDescriber errors,
            IServiceProvider services,
            ILogger<ApplicationUserManager> logger,
            IHttpContextAccessor contextAccessor,
            IUnitOfWork uow,
            IUsedPasswordsService usedPasswordsService)
            : base((UserStore<User, Role, ApplicationDbContext, int, UserClaim, UserRole, UserLogin, UserToken, RoleClaim>)store, optionsAccessor, passwordHasher, userValidators, passwordValidators, keyNormalizer, errors, services, logger)

services.AddScoped<IApplicationUserManager, ApplicationUserManager>();
services.AddScoped<UserManager<User>, ApplicationUserManager>();

public class ApplicationSignInManager :
    SignInManager<User>,
    IApplicationSignInManager

public ApplicationSignInManager(
            IApplicationUserManager userManager,
            IHttpContextAccessor contextAccessor,
            IUserClaimsPrincipalFactory<User> claimsFactory,
            IOptions<IdentityOptions> optionsAccessor,
            ILogger<ApplicationSignInManager> logger)
            : base((UserManager<User>)userManager, contextAccessor, claimsFactory, optionsAccessor, logger)

services.AddScoped<IApplicationSignInManager, ApplicationSignInManager>();
services.AddScoped<SignInManager<User>, ApplicationSignInManager>();

 services.AddIdentity<User, Role>(identityOptions =>
{
}).AddUserStore<ApplicationUserStore>()
  .AddUserManager<ApplicationUserManager>()
  .AddRoleStore<ApplicationRoleStore>()
  .AddRoleManager<ApplicationRoleManager>()
  .AddSignInManager<ApplicationSignInManager>()
  // You **cannot** use .AddEntityFrameworkStores() when you customize everything
  //.AddEntityFrameworkStores<ApplicationDbContext, int>()
  .AddDefaultTokenProviders();

        public static void UseCustomIdentityServices(this IApplicationBuilder app)
        {
            app.UseIdentity();

            var identityDbInitialize = app.ApplicationServices.GetService<IIdentityDbInitializer>();
            identityDbInitialize.Initialize();
            identityDbInitialize.SeedData();
        }

public class Magazine
{
  public int MagazineId { get; set; }
  public string Name { get; set; }
  public string Publisher { get; set; }

  public List<Article> Articles { get; set; }
}

public class Article
{
  public int ArticleId { get; set; }
  public string Title { get; set; }
  public DateTime PublishDate { get;  set; }

  public int MagazineId { get; set; }

  public Author Author { get; set; }
  public int? AuthorId { get; set; }
}

public class Author
{
  public int AuthorId { get; set; }
  public string Name { get; set; }

  public List<Article> Articles { get; set; }
}

protected override void OnModelCreating (ModelBuilder modelBuilder)
{
   modelBuilder.Entity<Magazine>().HasData(new Magazine { MagazineId = 1, Name = "DNT Magazine" });
}

migrationBuilder.InsertData(
  table: "Magazines",
  columns: new[] { "MagazineId", "Name", "Publisher" },
  values: new object[] { 1, "DNT Magazine", null });

set IDENTITY_INSERT ON
INSERT INTO "Magazines" ("MagazineId", "Name", "Publisher") VALUES (1, 'DNT Magazine', NULL);

modelBuilder.Entity<Magazine>()
           .HasData(new Magazine{ MagazineId=2, Name="This Mag" },
                    new Magazine{ MagazineId=3, Name="That Mag" }
           );

modelBuilder.Entity<Magazine>().Property(m=>m.Publisher).IsRequired();

 "The seed entity for entity type 'Magazine' cannot be added because there was no value provided for the required property 'Publisher'."

public Magazine(string name, string publisher)
{
  Name=name;
  Publisher=publisher;
}

modelBuilder.Entity<Magazine>().HasData(new Magazine("DNT Magazine", "1105 Media"));

modelBuilder.Entity<Magazine>().HasData(new {MagazineId=1, Name="DNT Mag", Publisher="1105 Media"});

migrationBuilder.InsertData(
                table: "Magazines",
                columns: new[] { "MagazineId", "Name", "Publisher" },
                values: new object[] { 1, "DNT Mag", "1105 Media" });

public class Magazine
{
  public Magazine(string name, string publisher)
  {
    Name=name;
    Publisher=publisher;
    MagazineId=Guid.NewGuid();
  }

  public Guid MagazineId { get; private set; }
  public string Name { get; private set; }
  public string Publisher { get; private set; }
  public List<Article> Articles { get; set; }
}

modelBuilder.Entity<Magazine>().HasData(new Magazine("DNT Mag", "1105 Media");

var mag1=new {MagazineId= new Guid("0483b59c-f7f8-4b21-b1df-5149fb57984e"),  Name="DNT Mag", Publisher="1105 Media"};
modelBuilder.Entity<Magazine>().HasData(mag1);

modelBuilder.Entity<Article>().HasData(new Article { ArticleId = 1, MagazineId = 1, Title = "EF Core 2.1 Query Types"});

var mag1=new {MagazineId= new Guid("0483b59c-f7f8-4b21-b1df-5149fb57984e"),  Name="DNT Mag", Publisher="1105 Media"};
modelBuilder.Entity<Magazine>().HasData(mag1);

public class Publisher
{
  public string Name { get; set; }
  public int YearFounded { get; set; }
}

public class Magazine
{ 
  public int MagazineId { get;  set; }
  public string Name { get;  set; }
  public Publisher Publisher { get;  set; }
  public List<Article> Articles { get; set; }
}

modelBuilder.Entity<Magazine>().HasData (new Magazine { MagazineId = 1, Name = "DNT Magazine" });
modelBuilder.Entity<Magazine>().OwnsOne (m => m.Publisher)
   .HasData (new { Name = "1105 Media", YearFounded = 2006, MagazineId=1 });

migrationBuilder.InsertData(
  table: "Magazines",
  columns: new[] { "MagazineId", "Name", "Publisher_Name", "Publisher_YearFounded" },
  values: new object[] { 1, "DNT Magazine", "1105 Media", 2006 });

namespace EFCoreMultipleDb.Web
{
    public class Startup
    {
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            applyPendingMigrations(app);
// ...
        }

        private static void applyPendingMigrations(IApplicationBuilder app)
        {
            var scopeFactory = app.ApplicationServices.GetRequiredService<IServiceScopeFactory>();
            using (var scope = scopeFactory.CreateScope())
            {
                var uow = scope.ServiceProvider.GetService<IUnitOfWork>();
                uow.Migrate();
            }
        }
    }
}

namespace EFCoreMultipleDb.DataLayer.SQLite.Context
{
    public class SQLiteDbContext : DbContext, IUnitOfWork
    {
    // ... 

        public void Migrate()
        {
            this.Database.Migrate();
        }
    }
}

public static void Main(string[] args)
{
   var host = BuildWebHost(args);
   using (var scope = host.Services.CreateScope())
   {
       var context = scope.ServiceProvider.GetRequiredService<yourDBContext>();
       context.Database.Migrate();
   }
   host.Run();
}

using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc.Razor;
 
namespace Core1RtmEmptyTest.StartupCustomizations
{
    public abstract class MyCustomBaseView<TModel> : RazorPage<TModel>
    {
        public bool IsAuthenticated()
        {
            return Context.User.Identity.IsAuthenticated;
        }
 
#pragma warning disable 1998
        public override async Task ExecuteAsync()
        {
        }
#pragma warning restore 1998
    }
}

@inherits Core1RtmEmptyTest.StartupCustomizations.MyCustomBaseView<TModel>

 Is Current User Authenticated? @IsAuthenticated()

@functions
 {
    public string Test()
    {
        return message;
    }
 
    readonly string message = "test";
}

 @Test()
<br />
@message

 @inject Microsoft.AspNetCore.Hosting.IHostingEnvironment Host;

 [Microsoft.AspNetCore.Mvc.Razor.Internal.RazorInjectAttribute]
public Microsoft.AspNetCore.Hosting.IHostingEnvironment Host { get; private set; }

 @inject IOptions<SmtpConfig> Settings;

interface Duck {
    walk: () => void;
    swim: () => void;
    quack: () => void;
}

let probablyADuck = {
    walk: () => console.log('walking like a duck'),
    swim: () => console.log('swimming like a duck'),
    quack: () => console.log('quacking like a duck')
}

function FlyOverWater(bird: Duck) { }

FlyOverWater(probablyADuck); // works!

interface Book {
    id: number;
    title: string;
    author: string;
    pages?: number;
    markDamaged: (reason: string) => void;
}

function CreateCustomerID(name: string, id: number): string {
    return name + id;
}

 let IdGenerator: (chars: string, nums: number) => string;

IdGenerator = CreateCustomerID;

interface StringGenerator {
     (chars: string, nums: number): string;
}

 let IdGenerator: StringGenerator;

interface LibraryResource {
   catalogNumber: number;
}

interface LibraryBook {
   title: string;
}

interface Encyclopedia extends LibraryResource, LibraryBook {
   volume: number;
}

let refBook: Encyclopedia = {
   catalogNumber: 1234,
   title: 'The Book of Everything',
   volume: 1
}

interface Librarian {
   doWork: () => void;
}

class ElementarySchoolLibrarian implements Librarian {
   doWork() {
     console.log('Reading to and teaching children...');
   }
}

 let kidsLibrarian: Librarian = new ElementarySchoolLibrarian();
kidsLibrarian.doWork();

  public class AuthenticationDocumentFilter : IDocumentFilter
    {
        private readonly IHttpContextAccessor httpContextAccessor;

        public AuthenticationDocumentFilter(IHttpContextAccessor httpContextAccessor)
        {
            this.httpContextAccessor = httpContextAccessor;
        }

        public void Apply(SwaggerDocument swaggerDoc, DocumentFilterContext context)
        {
            if (!httpContextAccessor.HttpContext.User.Identity.IsAuthenticated)
            {
                swaggerDoc.Definitions = new Dictionary<string, Schema>();
                swaggerDoc.Paths = new Dictionary<string, PathItem>();
            }
        }
    }

public enum Fabric
{
    [Description("پنبه")]
    Cotton,

    [Description("ابریشم")]
    Silk,

    [Description("پشم")]
    Wool,

    [Description("ابریشم مصنوعی")]
    Rayon,

    [Description("پارچه‌های دیگر")]
    Other
}

public class MyViewModel
{
    public Fabric Fabric { get; set; }
}

[Flags]
public enum Fabric
{
    [Description("پنبه")]
    Cotton = 1,

    [Description("ابریشم")]
    Silk = 2,

    [Description("پشم")]
    Wool = 4,

    [Description("ابریشم مصنوعی")]
    Rayon = 8,

    [Description("پارچه‌های دیگر")]
    Other = 128
}

Fabric cotWool = Fabric.Cotton | Fabric.Wool;
int cotWoolValue = (int) cotWool;

@Html.CheckBoxesForEnumFlagsFor(x => x.Fabric)

public class FlagEnumerationModelBinder : DefaultModelBinder
{
    public override object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
    {
        if (bindingContext == null) throw new ArgumentNullException("bindingContext");

        if (bindingContext.ValueProvider.ContainsPrefix(bindingContext.ModelName))
        {
            var values = GetValue<string[]>(bindingContext, bindingContext.ModelName);

            if (values.Length > 1 && (bindingContext.ModelType.IsEnum && bindingContext.ModelType.IsDefined(typeof(FlagsAttribute), false)))
            {
                long byteValue = 0;
                foreach (var value in values.Where(v => Enum.IsDefined(bindingContext.ModelType, v)))
                {
                    byteValue |= (int)Enum.Parse(bindingContext.ModelType, value);
                }

                return Enum.Parse(bindingContext.ModelType, byteValue.ToString());
            }
            else
            {
                return base.BindModel(controllerContext, bindingContext);
            }
        }

        return base.BindModel(controllerContext, bindingContext);
    }

    private static T GetValue<T>(ModelBindingContext bindingContext, string key)
    {
        if (bindingContext.ValueProvider.ContainsPrefix(key))
        {
            ValueProviderResult valueResult = bindingContext.ValueProvider.GetValue(key);
            if (valueResult != null)
            {
                bindingContext.ModelState.SetModelValue(key, valueResult);
                return (T)valueResult.ConvertTo(typeof(T));
            }
        }
        return default(T);
    }
}

ModelBinders.Binders.Add(typeof(Fabric), new FlagEnumerationModelBinder());

public class ModelEnums
{
    public static IEnumerable<Type> Types
    {
        get
        {
            var types = new List<Type> { typeof(Fabric) };
            return types;
        }
    }
}

foreach (var type in ModelEnums.Types)
{
   ModelBinders.Binders.Add(type, new FlagEnumerationModelBinder())
}