[Authorize(Roles = ConstantRoles.Admin)]
public class RolesManagerController : Controller

[Authorize(Policy="RequireAdministratorRole")]
public IActionResult Get()
{
   /* .. */
}

public void ConfigureServices(IServiceCollection services)
{
    services.AddMvc();
services.AddAuthorization(options =>
    {
        options.AddPolicy("RequireAdministratorRole", policy => policy.RequireRole("Admin"));
    });
}

 [Authorize(Roles = "Administrator, PowerUser, BackupAdministrator")]

options.AddPolicy("ElevatedRights", policy => policy.RequireRole("Administrator", "PowerUser", "BackupAdministrator"));

[Authorize(Policy = "ElevatedRights")]
public IActionResult Shutdown()
{
   return View();
}

services.AddAuthorization(options =>
{
   options.AddPolicy("EmployeeOnly", policy => policy.RequireClaim("EmployeeNumber"));
});

[Authorize(Policy = "EmployeeOnly")]
public IActionResult VacationBalance()
{
   return View();
}

public class DynamicPermissionRequirement : IAuthorizationRequirement
{
}

    public class DynamicPermissionsAuthorizationHandler : AuthorizationHandler<DynamicPermissionRequirement>
    {
        private readonly ISecurityTrimmingService _securityTrimmingService;

        public DynamicPermissionsAuthorizationHandler(ISecurityTrimmingService securityTrimmingService)
        {
            _securityTrimmingService = securityTrimmingService;
            _securityTrimmingService.CheckArgumentIsNull(nameof(_securityTrimmingService));
        }

        protected override Task HandleRequirementAsync(
             AuthorizationHandlerContext context,
             DynamicPermissionRequirement requirement)
        {
            var mvcContext = context.Resource as AuthorizationFilterContext;
            if (mvcContext == null)
            {
                return Task.CompletedTask;
            }

            var actionDescriptor = mvcContext.ActionDescriptor;
            var area = actionDescriptor.RouteValues["area"];
            var controller = actionDescriptor.RouteValues["controller"];
            var action = actionDescriptor.RouteValues["action"];

            if(_securityTrimmingService.CanCurrentUserAccess(area, controller, action))
            {
                context.Succeed(requirement);
            }
            else
            {
                context.Fail();
            }

            return Task.CompletedTask;
        }
    }

        private static void addDynamicPermissionsPolicy(this IServiceCollection services)
        {
            services.AddScoped<IAuthorizationHandler, DynamicPermissionsAuthorizationHandler>();
            services.AddAuthorization(opts =>
            {
                opts.AddPolicy(
                    name: ConstantPolicies.DynamicPermission,
                    configurePolicy: policy =>
                    {
                        policy.RequireAuthenticatedUser();
                        policy.Requirements.Add(new DynamicPermissionRequirement());
                    });
            });
        }

[Authorize(Policy = ConstantPolicies.DynamicPermission)]
[DisplayName("کنترلر نمونه با سطح دسترسی پویا")]
public class DynamicPermissionsSampleController : Controller

public interface IMvcActionsDiscoveryService
{
    ICollection<MvcControllerViewModel> MvcControllers { get; }
    ICollection<MvcControllerViewModel> GetAllSecuredControllerActionsWithPolicy(string policyName);
}

 [Authorize(Policy = ConstantPolicies.DynamicPermission)]

 return user.HasClaim(claim => claim.Type == ConstantPolicies.DynamicPermissionClaimType &&
claim.Value == currentClaimValue);

        public override void Process(TagHelperContext context, TagHelperOutput output)
        {
            context.CheckArgumentIsNull(nameof(context));
            output.CheckArgumentIsNull(nameof(output));

            // don't render the <security-trimming> tag.
            output.TagName = null;

            if(_securityTrimmingService.CanCurrentUserAccess(Area, Controller, Action))
            {
                // fine, do nothing.
                return;
            }

            // else, suppress the output and generate nothing.
            output.SuppressOutput();
        }

            <security-trimming asp-area="" asp-controller="DynamicPermissionsTest" asp-action="Products">
                <li>
                    <a asp-controller="DynamicPermissionsTest" asp-action="Products" asp-area="">
                        <span class="left5 fa fa-user" aria-hidden="true"></span>
                        گزارش از لیست محصولات
                    </a>
                </li>
            </security-trimming>

 var ticketStore = provider.GetService<ITicketStore>();
identityOptionsCookies.ApplicationCookie.SessionStore = ticketStore; // To manage large identity cookies

C:\Program Files\Microsoft ASP.NET\ASP.NET Web Pages\v2.0\Assemblies
C:\Program Files\Microsoft ASP.NET\ASP.NET MVC 4\Assemblies

{E53F8FEA-EAE0-44A6-8774-FFD645390401}

{E3E379DF-F4C6-4180-9B81-6769533ABE47}

System.Web.Mvc, Version=3.0.0.0
System.Web.WebPages, Version=1.0.0.0
System.Web.Helpers, Version=1.0.0.0
System.Web.WebPages.Razor, Version=1.0.0.0

System.Web.Mvc, Version=4.0.0.0
System.Web.WebPages, Version=2.0.0.0
System.Web.Helpers, Version=2.0.0.0
System.Web.WebPages.Razor, Version=2.0.0.0

C:\Program Files\Microsoft ASP.NET\ASP.NET Web Pages\v1.0\Assemblies
C:\Program Files\Microsoft ASP.NET\ASP.NET MVC 3\Assemblies

C:\Program Files\Microsoft ASP.NET\ASP.NET Web Pages\v2.0\Assemblies
C:\Program Files\Microsoft ASP.NET\ASP.NET MVC 4\Assemblies

<appSettings>
  <add key="webpages:Version" value="2.0.0.0" />
  <add key="PreserveLoginUrl" value="true" />
</appSettings>

<configuration>
  <!--... elements deleted for clarity ...-->
 
  <runtime>
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Helpers" 
             publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0" newVersion="2.0.0.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.Mvc" 
             publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0-3.0.0.0" newVersion="4.0.0.0"/>
      </dependentAssembly>
      <dependentAssembly>
        <assemblyIdentity name="System.Web.WebPages" 
             publicKeyToken="31bf3856ad364e35" />
        <bindingRedirect oldVersion="1.0.0.0" newVersion="2.0.0.0"/>
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>

    <pages>
      <namespaces>
        <add namespace="System.Web.Optimization" />
      </namespaces>
    </pages>

[ValidateAntiForgeryToken(Salt = "data123")]

using System.Collections.Generic;
using System.IO;
using System.Web;
using System.Web.Optimization;

namespace Common.WebToolkit
{
    /// <summary>
    /// A custom bundle orderer (IBundleOrderer) that will ensure bundles are 
    /// included in the order you register them.
    /// </summary>
    public class AsIsBundleOrderer : IBundleOrderer
    {
        public IEnumerable<FileInfo> OrderFiles(BundleContext context, IEnumerable<FileInfo> files)
        {
            return files;
        }
    }

    public static class BundleConfig
    {
        private static void addBundle(string virtualPath, bool isCss, params string[] files)
        {
            BundleTable.EnableOptimizations = true;

            var existing = BundleTable.Bundles.GetBundleFor(virtualPath);
            if (existing != null)
                return;

            var newBundle = isCss ? new Bundle(virtualPath, new CssMinify()) : new Bundle(virtualPath, new JsMinify());
            newBundle.Orderer = new AsIsBundleOrderer();

            foreach (var file in files)
                newBundle.Include(file);

            BundleTable.Bundles.Add(newBundle);
        }

        public static IHtmlString AddScripts(string virtualPath, params string[] files)
        {
            addBundle(virtualPath, false, files);
            return Scripts.Render(virtualPath);
        }

        public static IHtmlString AddStyles(string virtualPath, params string[] files)
        {
            addBundle(virtualPath, true, files);
            return Styles.Render(virtualPath);
        }

        public static IHtmlString AddScriptUrl(string virtualPath, params string[] files)
        {
            addBundle(virtualPath, false, files);
            return Scripts.Url(virtualPath);
        }

        public static IHtmlString AddStyleUrl(string virtualPath, params string[] files)
        {
            addBundle(virtualPath, true, files);
            return Styles.Url(virtualPath);
        }
    }
}

@using Common.WebToolkit

<link href="@BundleConfig.AddStyleUrl("~/Content/blueprint/print", "~/Content/blueprint/print.css")" rel="stylesheet" type="text/css" media="print"/>

@BundleConfig.AddScripts("~/Scripts/js",
                            "~/Scripts/jquery-1.8.0.min.js",
                            "~/Scripts/jquery.unobtrusive-ajax.min.js",
                            "~/Scripts/jquery.validate.min.js")

@BundleConfig.AddStyles("~/Content/css",
                            "~/Content/Site.css",
                            "~/Content/buttons.css")

http://site/Content/blueprint/print?v=hash

@BundleConfig.AddStyles("~/Content/noty/css",
                                "~/Content/noty/jquery.noty.css",
                                "~/Content/noty/noty_theme_default.css")

Microsoft.AspNetCore.Mvc.Core
Microsoft.AspNetCore.Mvc.Cors
Microsoft.AspNetCore.Mvc.Formatters.Json

namespace AspNetCoreWebAPIOnly 
{ 
    public class Startup 
    { 
        public void ConfigureServices(IServiceCollection services) 
        { 
            var mvcCoreBuilder = services.AddMvcCore(); 
            mvcCoreBuilder 
                .AddFormatterMappings() 
                .AddJsonFormatters() 
                .AddCors(); 
        } 

        public void Configure(IApplicationBuilder app, IHostingEnvironment env) 
        { 
            app.UseMvc(); 
        } 
    } 
}

namespace AspNetCoreWebAPIOnly.Controllers 
{ 
    [Route("api/[controller]")] 
    // ControllerBase instead of Controller 
    public class ValuesController : ControllerBase 
    { 
        // GET api/values 
        [HttpGet] 
        public IEnumerable<string> Get() 
        { 
            return new[] { "value1", "value2" }; 
        } 
    } 
}

using System;
using System.Threading;
using Microsoft.Extensions.DependencyInjection;

namespace Utils
{
    public static class ServiceLocatorProvider
    {
        private static readonly Lazy<IServiceProvider> _serviceProviderBuilder =
            new Lazy<IServiceProvider>(GetServiceProvider, LazyThreadSafetyMode.ExecutionAndPublication);

        /// <summary>
        /// A lazy loaded thread-safe singleton
        /// </summary>
        public static IServiceProvider Current { get; } = _serviceProviderBuilder.Value;

        private static IServiceProvider GetServiceProvider()
        {
            var services = new ServiceCollection();
            ConfigureServices(services);
            return services.BuildServiceProvider();
        }

        private static void ConfigureServices(IServiceCollection services)
        {
            // TODO: add other services here ... services.AddSingleton ....
        }
    }

    public static class ServiceLocator
    {
        public static object GetService(Type serviceType)
        {
            return ServiceLocatorProvider.Current.GetService(serviceType);
        }

        public static TService GetService<TService>()
        {
            return ServiceLocatorProvider.Current.GetService<TService>();
        }

        public static object GetRequiredService(Type serviceType)
        {
            return ServiceLocatorProvider.Current.GetRequiredService(serviceType);
        }

        public static TService GetRequiredService<TService>()
        {
            return ServiceLocatorProvider.Current.GetService<TService>();
        }

        public static void RunScopedService<T, S>(Action<S, T> callback)
        {
            using (var serviceScope = ServiceLocatorProvider.Current.GetRequiredService<IServiceScopeFactory>().CreateScope())
            {
                var context = serviceScope.ServiceProvider.GetRequiredService<S>();

                callback(context, serviceScope.ServiceProvider.GetRequiredService<T>());
                if (context is IDisposable disposable)
                {
                    disposable.Dispose();
                }
            }
        }

        public static void RunScopedService<S>(Action<S> callback)
        {
            using (var serviceScope = ServiceLocatorProvider.Current.GetRequiredService<IServiceScopeFactory>().CreateScope())
            {
                var context = serviceScope.ServiceProvider.GetRequiredService<S>();
                callback(context);
                if (context is IDisposable disposable)
                {
                    disposable.Dispose();
                }
            }
        }

        public static T RunScopedService<T, S>(Func<S, T> callback)
        {
            using (var serviceScope = ServiceLocatorProvider.Current.GetRequiredService<IServiceScopeFactory>().CreateScope())
            {
                var context = serviceScope.ServiceProvider.GetRequiredService<S>();
                return callback(context);
            }
        }
    }
}

[ServiceContract]
public interface IService1
{
    [OperationContract]
    Payment InsertPayment();
    [OperationContract]
    void DeletePayment(Payment payment);
}

public class Service1 : IService1
{
    public Payment InsertPayment()
    {
        using (var context = new EFRecipesEntities())
        {
            // delete the previous test data
            context.Database.ExecuteSqlCommand("delete from [payments]");
            context.Database.ExecuteSqlCommand("delete from [invoices]");
            var payment = new Payment { Amount = 99.95M, Invoice =
                new Invoice { Description = "Auto Repair" } };
            context.Payments.Add(payment);
            context.SaveChanges();
            return payment;
        }
    }

    public void DeletePayment(Payment payment)
    {
        using (var context = new EFRecipesEntities())
        {
            context.Entry(payment).State = EntityState.Deleted;
            context.SaveChanges();
        }
    }
}

class Program
{
    static void Main()
    {
        var client = new Service1Client();
        var payment = client.InsertPayment();
        client.DeletePayment(payment);
    }
}

var mockIdentityVerifier = new Mock<IIdentityVerifier>(MockBehavior.Strict);

Test method Loans.Tests.LoanApplicationProcessorShould.Accept threw exception:
Moq.MockException: IIdentityVerifier.Initialize() invocation failed with mock behavior Strict.
All invocations on the mock must have a corresponding setup.

mockIdentityVerifier.Setup(x => x.Initialize());

try
{
    _creditScorer.CalculateScore(application.Applicant.Name, application.Applicant.Address);
}
catch
{
    return application.IsAccepted;
}
 

mockCreditScorer.Setup(x =>
                    x.CalculateScore(It.IsAny<string>(), It.IsAny<string>()))
                .Throws(new InvalidOperationException("Test Exception"));

Assert.IsFalse(application.IsAccepted);

using System;

namespace Loans.Models
{
    public class CreditScoreResultArgs : EventArgs
    {
        public int Score { get; set; }
    }
}

public interface ICreditScorer
{
   event EventHandler<CreditScoreResultArgs> ResultAvailable;

mockCreditScorer.Raise(x => x.ResultAvailable += null, new CreditScoreResultArgs());

mockCreditScorer.Setup(x =>
                x.CalculateScore(It.IsAny<string>(), It.IsAny<string>()))
                .Raises(x => x.ResultAvailable += null, new CreditScoreResultArgs());

namespace Loans.Tests
{
    [TestClass]
    public class LoanApplicationProcessorShould
    {        
        [TestMethod]
        public void AcceptUsingPartialMock()
        {
            var product = new LoanProduct {Id = 99, ProductName = "Loan", InterestRate = 5.25m};
            var amount = new LoanAmount {CurrencyCode = "Rial", Principal = 2_000_000_0};
            var applicant =
                new Applicant {Id = 1, Name = "User 1", Age = 25, Address = "This place", Salary = 1_500_000_0};
            var application = new LoanApplication {Id = 42, Product = product, Amount = amount, Applicant = applicant};

            var mockIdentityVerifier = new Mock<IdentityVerifierServiceGateway>();

            mockIdentityVerifier.Setup(x => x.CallService(applicant.Name, applicant.Age, applicant.Address))
                .Returns(true);

            var mockCreditScorer = new Mock<ICreditScorer>();
            mockCreditScorer.Setup(x => x.ScoreResult.ScoreValue.Score).Returns(110_000);

            var sut = new LoanApplicationProcessor(mockIdentityVerifier.Object, mockCreditScorer.Object);
            sut.Process(application);

            Assert.IsTrue(application.IsAccepted);
        }
    }
}

public virtual bool CallService(string applicantName, int applicantAge, string applicantAddress)

public bool Validate(string applicantName, int applicantAge, string applicantAddress)
{
    Connect();
    var isValidIdentity = CallService(applicantName, applicantAge, applicantAddress);
    LastCheckTime = DateTime.Now;
    Disconnect();

    return isValidIdentity;
}

public bool Validate(string applicantName, int applicantAge, string applicantAddress)
{
    Connect();
    var isValidIdentity = CallService(applicantName, applicantAge, applicantAddress);
    LastCheckTime = GetCurrentTime();
    Disconnect();

    return isValidIdentity;
}

public virtual DateTime GetCurrentTime()
{
    return DateTime.Now;
}

var expectedTime = new DateTime(2000, 1, 1);
mockIdentityVerifier.Setup(x => x.GetCurrentTime())
    .Returns(expectedTime);
// ...
Assert.AreEqual(expectedTime, mockIdentityVerifier.Object.LastCheckTime);

mockIdentityVerifier.Protected().Setup<bool>(
        "CallService",applicant.Name, applicant.Age, applicant.Address)
    .Returns(true);

var expectedTime = new DateTime(2000, 1, 1);
mockIdentityVerifier.Protected().Setup<DateTime>("GetCurrentTime")
    .Returns(expectedTime);

interface IIdentityVerifierServiceGatewayProtectedMembers
{
   DateTime GetCurrentTime();
   bool CallService(string applicantName, int applicantAge, string applicantAddress);
}

mockIdentityVerifier.Protected()
    .As<IIdentityVerifierServiceGatewayProtectedMembers>()
    .Setup(x => x.CallService(It.IsAny<string>(),
        It.IsAny<int>(),
        It.IsAny<string>()))
    .Returns(true);

var expectedTime = new DateTime(2000, 1, 1);
mockIdentityVerifier.Protected()
    .As<IIdentityVerifierServiceGatewayProtectedMembers>()
    .Setup(x => x.GetCurrentTime())
    .Returns(expectedTime);

using System;

namespace Loans.Services.Contracts
{
    public interface INowProvider
    {
        DateTime GetNow();
    }
}

    public class IdentityVerifierServiceGateway : IIdentityVerifier
    {
        private readonly INowProvider _nowProvider;
        
        public DateTime LastCheckTime { get; private set; }

        public IdentityVerifierServiceGateway(INowProvider nowProvider)
        {
            _nowProvider = nowProvider;
        }

        public bool Validate(string applicantName, int applicantAge, string applicantAddress)
        {
            Connect();
            var isValidIdentity = CallService(applicantName, applicantAge, applicantAddress);
            LastCheckTime = _nowProvider.GetNow();
            // ...

var mockNowProvider = new Mock<INowProvider>();
mockNowProvider.Setup(x => x.GetNow()).Returns(expectedTime);

var mockIdentityVerifier =  new Mock<IdentityVerifierServiceGateway>(mockNowProvider.Object);

var o = new orgChart();

o.addNode( 0, '', '', 'Root 1');
o.addNode( 1,  0, 'u', 'u-Node 1');
o.addNode( 2,  0, 'u', 'u-Node 2');
o.addNode( 3,  0, 'u', 'u-Node 3');
o.addNode( 4,  0, 'u', 'u-Node 4');









//میتوانید خط زیر را فعال نمائید تا تفاوت فضای ایجاد شده و مورد نیاز را مشاهده نمائید.









 //o.addNode( 9,  3, 'u', 'EXTRA', 0, '', '#CC0000', '#FF0000');
o.addNode(11,  2, 'l', 'l-Node');
o.addNode(12,  2, 'u', 'u-Node');
o.addNode(13,  2, 'u', 'u-Node');
o.addNode(14,  2, 'r', 'r-Node');
o.addNode(20,  4, 'l', 'l-Node');
o.addNode(21, '', '', 'Root 2');

o.drawChart('c_layout');

var o = new orgChart();

o.setFont('Arial', 18);
o.addNode( 0, '', '', 'President', 1);

o.setFont('Arial', 12);
o.addNode('',  0, 'l', 'Control');
o.addNode('',  0, 'l', 'Secretary');
o.addNode('',  0, 'l', 'Marketing');
o.addNode('',  0, 'l', 'Human resources');

o.setColor('#99CC99', '#CCFFCC');
o.addNode(12,  0, 'r', 'Facility');
o.addNode('', 12, 'r', 'IT');
o.addNode('', 12, 'r', 'Resource planning');

o.setFont('Arial', 18);
o.setColor('#CCCC66', '#FFFF99');
o.addNode(20,  0, 'u', 'Projects', 1);

o.setFont('Arial', 12);
o.addNode('', 20, 'r', 'Management');
o.addNode('', 20, 'r', 'Finance');
o.addNode('', 20, 'l', 'Development');
o.addNode('', 20, 'l', 'Maintenance');
o.addNode('', 20, 'l', 'Specials');

o.setColor('#CC4950', '#FF7C80');
o.setFont('Arial', 18);
o.addNode(30,  0, 'u', 'Specials', 1);

o.setFont('Arial', 12);
o.addNode(31, 30, 'l', 'Management');
o.addNode('', 30, 'l', 'Communication');
o.addNode(33, 30, 'r', 'Development');
o.addNode(34, 33, 'r', 'Maintenance');
o.addNode('', 33, 'r', 'Special A');
o.addNode('', 33, 'r', 'Special B');
o.addNode('', 33, 'r', 'Advice');
o.addNode('', 30, 'l', 'Taskforce');

o.setColor('#CC9966', '#FFCC99');
o.setFont('Arial', 18);
o.addNode(40,  0, 'u', 'Programming', 1);

o.setFont('Arial', 12);
o.addNode(41, 40, 'l', 'Management');
o.addNode(42, 40, 'l', 'Finance');
o.addNode('', 40, 'r', 'Assessment');
o.addNode('', 40, 'r', 'Coding team');
o.addNode('', 40, 'r', 'Quality control');

o.drawChart('c_ex1', '', true);

var o = new orgChart();

o.setSize(120, 60);

o.setFont('Arial', 18);
o.addNode( 1, '', '', 'Icon smiley', 0, '', '', '', '', 'pic/smiley.gif');
o.addNode( 2, '', '', 'This is a tree', 0, '', '', '', '', 'pic/tree.jpg');
o.addNode( 3, 2, 'u', 'This is a tree');
o.addNode( 4, '', '', 'Right Top smiley', 0, '', '', '', '', 'pic/smiley.gif', 'rt');
o.addNode( 5, '', '', 'Center bottom smiley', 0, '', '', '', '', 'pic/smiley.gif', 'cb');

o.drawChart('c_img');

var o = new orgChart();

o.setSize(60, 110);

o.setFont('Arial', 12);
o.addNode( 1, '', '', 'Hominidae');
o.addNode( 10, 1, 'l', 'Hominidae');
o.addNode( 11, 10, 'l', 'Hominini');
o.addNode( 12, 10, 'r', 'Gorillini');
o.addNode( 20, 1, 'r', 'Ponginae');
o.addNode( '', 11, '', 'Homo Sapiens', '', '', '', '', '', 'pic/homo.jpg', 'ct');
o.addNode( '', 11, '', 'Pan', '', '', '', '', '', 'pic/pan.jpg', 'ct');
o.addNode( '', 12, '', 'Gorilla', '', '', '', '', '', 'pic/gorilla.jpg', 'ct');
o.addNode( '', 20, '', 'Pongo', '', '', '', '', '', 'pic/pongo.jpg', 'ct');

o.drawChart('c_img2', 'c');

<script type="text/javascript">
function openAsPng(id){
        window.open(document.getElementById(id).toDataURL("image/png"));
}
function saveAsPng(id){
var img = document.getElementById(id).toDataURL("image/png");
        document.location.href = img.replace("image/png", "image/octet-stream");
}
</script>

<a href = "javascript:openAsPng('c_ex1');">Click here to open the image as png in a new window</a><BR>
<a href = "javascript:saveAsPng('c_ex1');">Click here to save the image as png</a><BR>

<canvas id="c_pngchart" width="1" height="1">Your browser does not support canvas!</canvas>

<img id="pngchart">
<script type="text/javascript">
var o = new orgChart();
o.addNode(0, '', '', 'Root');
o.addNode(1, 0, 'u', 'u-Node 1');
o.addNode(2, 0, 'u', 'u-Node 2');
o.drawChart('c_pngchart', '', true);
var canvas = document.getElementById('c_pngchart');
document.getElementById("pngchart").src = canvas.toDataURL("image/png");
// The html keyword "hidden" doesn't work in IE, so resize the canvas to NUL
canvas.height = 0;
canvas.width = 0;
</script>

<partial name="_CookieConsentPartial" />

@using Microsoft.AspNetCore.Http.Features
@{
  var consentFeature = Context.Features.Get<ITrackingConsentFeature>();
  var showBanner = !consentFeature?.CanTrack ?? false;
  var cookieString = consentFeature?.CreateConsentCookie();
}

public void ConfigureServices(IServiceCollection services)
{
   services.Configure<CookiePolicyOptions>(options =>
   {
     // This lambda determines whether user consent for non-essential cookies is needed for a given request.
     options.CheckConsentNeeded = context => true;
     options.MinimumSameSitePolicy = SameSiteMode.None;
   });

public void Configure(IApplicationBuilder app, IHostingEnvironment env)
{
   // ...
   app.UseCookiePolicy();

 dotnet add package Microsoft.AspNetCore.Identity.UI --version 2.1.0-rc1-final