.NET 7 Release Candidate 1 (RC1) is now available and includes many great new improvements to ASP.NET Core.

Here’s a summary of what’s new in this preview release:

• Dynamic authentication requests in Blazor WebAssembly
• Handle location changing events
• Blazor WebAssembly debugging improvements
• .NET WebAssembly build tools for .NET 6 projects
• .NET JavaScript interop on WebAssembly
• Kestrel full certificate chain improvements
• Faster HTTP/2 uploads
• HTTP/3 improvements
• Experimental Kestrel support for WebTransport over HTTP/3
• Experimental OpenAPI support for gRPC JSON transcoding
• Rate limiting middleware improvements
• macOS dev-certs improvements 

namespace PluginsBase
{
    public interface IPlugin
    {
        string Name { get; }
        void Run();
    }
}

using PluginsBase;

namespace Plugin1
{
    public class Plugin1Main : IPlugin
    {
        public string Name
        {
            get { return "Test 1"; }
        }

        public void Run()
        {
            // todo: ...
        }
    }
}

 Copy "$(ProjectDir)$(OutDir)$(TargetName).*" "$(SolutionDir)WinFormsWithPluginSupport\bin\debug\Plugins"

 Copy "$(ProjectDir)$(OutDir)*.*" "$(SolutionDir)WinFormsWithPluginSupport\bin\debug\Plugins"

 PM> install-package structuremap

using System.IO;
using System.Windows.Forms;
using PluginsBase;
using StructureMap.Configuration.DSL;
using StructureMap.Graph;

namespace WinFormsWithPluginSupport.Core
{
    public class PluginsRegistry : Registry
    {
        public PluginsRegistry()
        {
            this.Scan(scanner =>
            {
                scanner.AssembliesFromPath(
                    path: Path.Combine(Application.StartupPath, "plugins"),
                    // یک اسمبلی نباید دوبار بارگذاری شود
                    assemblyFilter: assembly =>
                    {
                        return !assembly.FullName.Equals(typeof(IPlugin).Assembly.FullName);
                    });
                scanner.AddAllTypesOf<IPlugin>().NameBy(item => item.FullName);
            });
        }
    }
}

using System;
using System.Threading;
using StructureMap;

namespace WinFormsWithPluginSupport
{
    public static class IocConfig
    {
        private static readonly Lazy<Container> _containerBuilder =
            new Lazy<Container>(defaultContainer, LazyThreadSafetyMode.ExecutionAndPublication);

        public static IContainer Container
        {
            get { return _containerBuilder.Value; }
        }

        private static Container defaultContainer()
        {
            return new Container(x =>
            {
                x.AddRegistry<PluginsRegistry>();
            });
        }
    }
}

using System.Windows.Forms;
using StructureMap;

namespace WinFormsWithPluginSupport
{
    public partial class FrmMain : Form
    {
        private readonly IContainer _container;

        public FrmMain(IContainer container)
        {
            _container = container;
            InitializeComponent();
        }
    }
}

using System;
using System.Windows.Forms;

namespace WinFormsWithPluginSupport
{
    static class Program
    {
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(IocConfig.Container.GetInstance<FrmMain>());
        }
    }
}

using System.Linq;
using System.Windows.Forms;
using PluginsBase;
using StructureMap;
using WinFormsWithPluginSupport.Core;

namespace WinFormsWithPluginSupport
{
    public partial class FrmMain : Form
    {
        private readonly IContainer _container;

        public FrmMain(IContainer container)
        {
            _container = container;
            InitializeComponent();
        }

        private void BtnRun_Click(object sender, System.EventArgs e)
        {
            var plugins = _container.GetAllInstances<IPlugin>().ToList();
            foreach (var plugin in plugins)
            {
                plugin.Run();
            }
        }

        private void BtnReload_Click(object sender, System.EventArgs e)
        {
            _container.EjectAllInstancesOf<IPlugin>();
            _container.Configure(x =>
                x.AddRegistry<PluginsRegistry>()
            );
        }
    }
}

@for( int c = 0; c < 10; c++ )
{
   <li>
       <a href="#" @onclick="@(_=> OnLinkClicked(c))">@c</a>
   </li>
}

@for( int c = 0; c < 10; c++ )
{
   var current = c;
   <li>
       <a href="#" @onclick="@(_=> OnLinkClicked(current))">@current</a>
   </li>
}

@foreach(var c in Enumerable.Range(0,10))
{
   <li>
       <a href="#" @onclick="@(_=> OnLinkClicked(c))">@c</a>
   </li>
}

The web accessibility basics