C# vNext Features with Status
This page contains the list of features the C# team is currently working on and their progress status.
When a feature status is "Merged" this means that the work to implement the feature is complete and available in the next preview version. 

Benchmarking .NET libraries for image resizing: which performs best?

Which .NET library is fastest at image resizing? Which one uses the least memory? A benchmark comparison of ImageSharp, Magick.NET, NetVips, and SkiaSharp.

In my earlier post Getting Started: Xamarin Forms with .NET Standard I covered how to create a new Xamarin Forms project which uses a .NET Standard 1.4 library to share the views between iOS, Android and UWP. 

.Net Core is a lightweight and cross-platform version of the DotNet framework and the awesome thing is Developers required the same expertise to work with Asp.Net Core as .Net Framework. 

The purpose of this post isn’t to give an exhaustive tour of Aurelia features, but to show a simple Aurelia application running in ASP.NET 5 and demystify some of the tools you’ll commonly see used with Aurelia.  

.NET 7 brings your apps increased performance and new features for C# 11/F# 7, .NET MAUI, ASP.NET Core/Blazor, Web APIs, WinForms, WPF and more. With .NET 7, you can also easily containerize your .NET 7 projects, set up CI/CD workflows in GitHub actions, and achieve cloud-native observability.

Thanks to the open-source .NET community for your numerous contributions that helped shape this .NET 7 release. 28k contributions made by over 8900 contributors throughout the .NET 7 release!

.NET remains one of the fastest, most loved, and trusted platforms with an expansive .NET package ecosystem that includes over 330,000 packages. 

"securitySchemes":
{ "basicAuth":
       {
             "type":"http",
             "description":"Input your username and password to access this API",
             "scheme":"basic"
       }
}
…
"security":[
  {"basicAuth":[]}
]

using Microsoft.AspNetCore.Authentication;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using System;
using System.Net.Http.Headers;
using System.Security.Claims;
using System.Text;
using System.Text.Encodings.Web;
using System.Threading.Tasks;

namespace OpenAPISwaggerDoc.Web.Authentication
{
    public class BasicAuthenticationHandler : AuthenticationHandler<AuthenticationSchemeOptions>
    {
        public BasicAuthenticationHandler(
            IOptionsMonitor<AuthenticationSchemeOptions> options,
            ILoggerFactory logger,
            UrlEncoder encoder,
            ISystemClock clock)
            : base(options, logger, encoder, clock)
        {
        }

        protected override Task<AuthenticateResult> HandleAuthenticateAsync()
        {
            if (!Request.Headers.ContainsKey("Authorization"))
            {
                return Task.FromResult(AuthenticateResult.Fail("Missing Authorization header"));
            }

            try
            {
                var authenticationHeader = AuthenticationHeaderValue.Parse(Request.Headers["Authorization"]);
                var credentialBytes = Convert.FromBase64String(authenticationHeader.Parameter);
                var credentials = Encoding.UTF8.GetString(credentialBytes).Split(':');
                var username = credentials[0];
                var password = credentials[1];

                if (username == "DNT" && password == "123")
                {
                    var claims = new[] { new Claim(ClaimTypes.NameIdentifier, username) };
                    var identity = new ClaimsIdentity(claims, Scheme.Name);
                    var principal = new ClaimsPrincipal(identity);
                    var ticket = new AuthenticationTicket(principal, Scheme.Name);
                    return Task.FromResult(AuthenticateResult.Success(ticket));
                }
                return Task.FromResult(AuthenticateResult.Fail("Invalid username or password"));
            }
            catch
            {
                return Task.FromResult(AuthenticateResult.Fail("Invalid Authorization header"));
            }
        }
    }
}

namespace OpenAPISwaggerDoc.Web
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddAuthentication(defaultScheme: "Basic")
                    .AddScheme<AuthenticationSchemeOptions, BasicAuthenticationHandler>("Basic", null);

namespace OpenAPISwaggerDoc.Web
{
    public class Startup
    {
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
   // ...
            app.UseStaticFiles();

            app.UseAuthentication();

            app.UseMvc();
        }
    }
}

namespace OpenAPISwaggerDoc.Web
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
     // ...
   
            services.AddMvc(setupAction =>
            {
                setupAction.Filters.Add(new AuthorizeFilter());
        // ...

namespace OpenAPISwaggerDoc.Web
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddSwaggerGen(setupAction =>
            {
   // ...

                setupAction.AddSecurityDefinition("basicAuth", new OpenApiSecurityScheme
                {
                    Type = SecuritySchemeType.Http,
                    Scheme = "basic",
                    Description = "Input your username and password to access this API"
                });
            });

namespace OpenAPISwaggerDoc.Web
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddMvc(setupAction =>
            {
                setupAction.Filters.Add(new ProducesResponseTypeAttribute(StatusCodes.Status401Unauthorized));

namespace OpenAPISwaggerDoc.Web
{
    public class Startup
    {
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddSwaggerGen(setupAction =>
            {
    // ...

                setupAction.AddSecurityRequirement(new OpenApiSecurityRequirement
                {
                    {
                        new OpenApiSecurityScheme
                        {
                            Reference = new OpenApiReference
                            {
                                Type = ReferenceType.SecurityScheme,
                                Id = "basicAuth"
                            }
                        },
                        new List<string>()
                    }
                });
            });

• NET Core. نسخه‌های 2.1.607 و 3.0.101 در دو step نصب شده اند.
• سپس sync کردن این دو توسط دستور rsync انجام شده است.
  
• توسط تنظیم --framework به مقادیر netcoreapp2.1 و netcoreapp3.0 ، عملیات build توسط این دو target انجام شده است.

The ASP.NET Core tag helpers improve on the HTML templated helpers in ASP.NET MVC 5. ASP.NET Core comes with some useful stock tag helpers for common tasks such as creating custom elements or extending existing HTML elements, but their use can be extended to making a framework such as Bootstrap easier to work with. Dino shows how helpers are used, and demonstrates a Bootstrap Modal Tag Helper 

using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;

namespace AngularTemplateDrivenFormsLab.Utils
{
    public class ContentSecurityPolicyMiddleware
    {
        private readonly RequestDelegate _next;

        public ContentSecurityPolicyMiddleware(RequestDelegate next)
        {
            _next = next;
        }

        public Task Invoke(HttpContext context)
        {
            context.Response.Headers.Add("X-Frame-Options", "SAMEORIGIN");
            context.Response.Headers.Add("X-Xss-Protection", "1; mode=block");
            context.Response.Headers.Add("X-Content-Type-Options", "nosniff");

            string[] csp =
            {
              "default-src 'self'",
              "style-src 'self' 'unsafe-inline'",
              "script-src 'self' 'unsafe-inline' 'unsafe-eval'",
              "font-src 'self'",
              "img-src 'self' data:",
              "connect-src 'self'",
              "media-src 'self'",
              "object-src 'self'",
              "report-uri /api/CspReport/Log" //TODO: Add api/CspReport/Log
            };
            context.Response.Headers.Add("Content-Security-Policy", string.Join("; ", csp));
            return _next(context);
        }
    }

    public static class ContentSecurityPolicyMiddlewareExtensions
    {
        /// <summary>
        /// Make sure you add this code BEFORE app.UseStaticFiles();,
        /// otherwise the headers will not be applied to your static files.
        /// </summary>
        public static IApplicationBuilder UseContentSecurityPolicy(this IApplicationBuilder builder)
        {
            return builder.UseMiddleware<ContentSecurityPolicyMiddleware>();
        }
    }
}

public void Configure(IApplicationBuilder app)
{
   app.UseContentSecurityPolicy();

 context.Response.Headers.Add("X-Frame-Options", "SAMEORIGIN");

 context.Response.Headers.Add("X-Xss-Protection", "1; mode=block");

 context.Response.Headers.Add("X-Content-Type-Options", "nosniff");

string[] csp =
            {
              "default-src 'self'",
              "style-src 'self' 'unsafe-inline'",
              "script-src 'self' 'unsafe-inline' 'unsafe-eval'",
              "font-src 'self'",
              "img-src 'self' data:",
              "connect-src 'self'",
              "media-src 'self'",
              "object-src 'self'",
              "report-uri /api/CspReport/Log" //TODO: Add api/CspReport/Log
            };
context.Response.Headers.Add("Content-Security-Policy", string.Join("; ", csp));

 Set-Cookie: sess=abc123; path=/; SameSite

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <system.webServer>
    <rewrite>
      <outboundRules>
        <clear />
        <!-- https://scotthelme.co.uk/csrf-is-dead/ -->
        <rule name="Add SameSite" preCondition="No SameSite">
          <match serverVariable="RESPONSE_Set_Cookie" pattern=".*" negate="false" />
          <action type="Rewrite" value="{R:0}; SameSite=lax" />
          <conditions></conditions>
        </rule>
        <preConditions>
          <preCondition name="No SameSite">
            <add input="{RESPONSE_Set_Cookie}" pattern="." />
            <add input="{RESPONSE_Set_Cookie}" pattern="; SameSite=lax" negate="true" />
          </preCondition>
        </preConditions>
      </outboundRules>
    </rewrite>
  </system.webServer>
</configuration>

   "report-uri /api/CspReport/Log" //TODO: Add api/CspReport/Log

{
  "csp-report": {
    "document-uri": "http://localhost:5000/untypedSha",
    "referrer": "",
    "violated-directive": "script-src",
    "effective-directive": "script-src",
    "original-policy": "default-src 'self'; style-src 'self'; script-src 'self'; font-src 'self'; img-src 'self' data:; connect-src 'self'; media-src 'self'; object-src 'self'; report-uri /api/Home/CspReport",
    "disposition": "enforce",
    "blocked-uri": "eval",
    "line-number": 21,
    "column-number": 8,
    "source-file": "http://localhost:5000/scripts.bundle.js",
    "status-code": 200,
    "script-sample": ""
  }
}

    class CspPost
    {
        [JsonProperty("csp-report")]
        public CspReport CspReport { get; set; }
    }

    class CspReport
    {
        [JsonProperty("document-uri")]
        public string DocumentUri { get; set; }

        [JsonProperty("referrer")]
        public string Referrer { get; set; }

        [JsonProperty("violated-directive")]
        public string ViolatedDirective { get; set; }

        [JsonProperty("effective-directive")]
        public string EffectiveDirective { get; set; }

        [JsonProperty("original-policy")]
        public string OriginalPolicy { get; set; }

        [JsonProperty("disposition")]
        public string Disposition { get; set; }

        [JsonProperty("blocked-uri")]
        public string BlockedUri { get; set; }

        [JsonProperty("line-number")]
        public int LineNumber { get; set; }

        [JsonProperty("column-number")]
        public int ColumnNumber { get; set; }

        [JsonProperty("source-file")]
        public string SourceFile { get; set; }

        [JsonProperty("status-code")]
        public string StatusCode { get; set; }

        [JsonProperty("script-sample")]
        public string ScriptSample { get; set; }
    }

namespace AngularTemplateDrivenFormsLab.Controllers
{
    [Route("api/[controller]")]
    public class CspReportController : Controller
    {
        [HttpPost("[action]")]
        [IgnoreAntiforgeryToken]
        public async Task<IActionResult> Log()
        {
            CspPost cspPost;
            using (var bodyReader = new StreamReader(this.HttpContext.Request.Body))
            {
                var body = await bodyReader.ReadToEndAsync().ConfigureAwait(false);
                this.HttpContext.Request.Body = new MemoryStream(Encoding.UTF8.GetBytes(body));
                cspPost = JsonConvert.DeserializeObject<CspPost>(body);
            }

            //TODO: log cspPost

            return Ok();
        }
    }
}