We are thrilled to announce that the webhint browser extension has moved from beta to its v1 release and is now available for Insider builds of Microsoft Edge, as well as for Chrome and Firefox! 

100 Websites That Shaped the Internet as We Know It 

using StructureMap;
using StructureMap.Configuration.DSL;
using SoCPatterns.Layered.Repository;
using SoCPatterns.Layered.Model;

namespace SoCPatterns.Layered.WebUI
{
    public class BootStrapper
    {
        public static void ConfigureStructureMap()
        {
            ObjectFactory.Initialize(x => x.AddRegistry<ProductRegistry>());
        }
    }
    public class ProductRegistry : Registry
    {
        public ProductRegistry()
        {
            For<IProductRepository>().Use<ProductRepository>();
        }
    }
}

namespace SoCPatterns.Layered.WebUI
{
    public class Global : System.Web.HttpApplication
    {
        protected void Application_Start(object sender, EventArgs e)
        {
            BootStrapper.ConfigureStructureMap();
        }
    }
}

namespace SoCPatterns.Layered.WinUI
{
    static class Program
    {
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            BootStrapper.ConfigureStructureMap();
            Application.Run(new Form1());
        }
    }
}

<asp:DropDownList AutoPostBack="true" ID="ddlCustomerType" runat="server">
    <asp:ListItem Value="0">Standard</asp:ListItem>
    <asp:ListItem Value="1">Trade</asp:ListItem>
</asp:DropDownList>
<asp:Label ID="lblErrorMessage" runat="server" ></asp:Label>
<asp:Repeater ID="rptProducts" runat="server" >
    <HeaderTemplate>
        <table>
            <tr>
                <td>Name</td>
                <td>RRP</td>
                <td>Selling Price</td>
                <td>Discount</td>
                <td>Savings</td>
            </tr>
            <tr>
                <td colspan="5"><hr /></td>
            </tr>
    </HeaderTemplate>
    <ItemTemplate>
            <tr>
                <td><%# Eval("Name") %></td>
                <td><%# Eval("RRP")%></td>
                <td><%# Eval("SellingPrice") %></td>
                <td><%# Eval("Discount") %></td>
                <td><%# Eval("Savings") %></td>
            </tr>
    </ItemTemplate>
    <FooterTemplate>
        </table>
    </FooterTemplate>
</asp:Repeater>

#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
    this.cmbCustomerType = new System.Windows.Forms.ComboBox();
    this.dgvProducts = new System.Windows.Forms.DataGridView();
    this.colName = new System.Windows.Forms.DataGridViewTextBoxColumn();
    this.colRrp = new System.Windows.Forms.DataGridViewTextBoxColumn();
    this.colSellingPrice = new System.Windows.Forms.DataGridViewTextBoxColumn();
    this.colDiscount = new System.Windows.Forms.DataGridViewTextBoxColumn();
    this.colSavings = new System.Windows.Forms.DataGridViewTextBoxColumn();
    ((System.ComponentModel.ISupportInitialize)(this.dgvProducts)).BeginInit();
    this.SuspendLayout();
    //
    // cmbCustomerType
    //
    this.cmbCustomerType.DropDownStyle =                                                                                                                                                                             System.Windows.Forms.ComboBoxStyle.DropDownList;
    this.cmbCustomerType.FormattingEnabled = true;
    this.cmbCustomerType.Items.AddRange(new object[] {
        "Standard",
        "Trade"});
    this.cmbCustomerType.Location = new System.Drawing.Point(12, 90);
    this.cmbCustomerType.Name = "cmbCustomerType";
    this.cmbCustomerType.Size = new System.Drawing.Size(121, 21);
    this.cmbCustomerType.TabIndex = 3;
    //
    // dgvProducts
    //
    this.dgvProducts.ColumnHeadersHeightSizeMode =     System.Windows.Forms.DataGridViewColumnHeadersHeightSizeMode.AutoSize;
    this.dgvProducts.Columns.AddRange(new System.Windows.Forms.DataGridViewColumn[] {
    this.colName,
    this.colRrp,
    this.colSellingPrice,
    this.colDiscount,
    this.colSavings});
    this.dgvProducts.Location = new System.Drawing.Point(12, 117);
    this.dgvProducts.Name = "dgvProducts";
    this.dgvProducts.Size = new System.Drawing.Size(561, 206);
    this.dgvProducts.TabIndex = 2;
    //
    // colName
    //
    this.colName.DataPropertyName = "Name";
    this.colName.HeaderText = "Product Name";
    this.colName.Name = "colName";
    this.colName.ReadOnly = true;
    //
    // colRrp
    //
    this.colRrp.DataPropertyName = "Rrp";
    this.colRrp.HeaderText = "RRP";
    this.colRrp.Name = "colRrp";
    this.colRrp.ReadOnly = true;
    //
    // colSellingPrice
    //
    this.colSellingPrice.DataPropertyName = "SellingPrice";
    this.colSellingPrice.HeaderText = "Selling Price";
    this.colSellingPrice.Name = "colSellingPrice";
    this.colSellingPrice.ReadOnly = true;
    //
    // colDiscount
    //
    this.colDiscount.DataPropertyName = "Discount";
    this.colDiscount.HeaderText = "Discount";
    this.colDiscount.Name = "colDiscount";
    //
    // colSavings
    //
    this.colSavings.DataPropertyName = "Savings";
    this.colSavings.HeaderText = "Savings";
    this.colSavings.Name = "colSavings";
    this.colSavings.ReadOnly = true;
    //
    // Form1
    //
    this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
    this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
    this.ClientSize = new System.Drawing.Size(589, 338);
    this.Controls.Add(this.cmbCustomerType);
    this.Controls.Add(this.dgvProducts);
    this.Name = "Form1";
    this.Text = "Form1";
    ((System.ComponentModel.ISupportInitialize)(this.dgvProducts)).EndInit();
    this.ResumeLayout(false);
}
#endregion
private System.Windows.Forms.ComboBox cmbCustomerType;
private System.Windows.Forms.DataGridView dgvProducts;
private System.Windows.Forms.DataGridViewTextBoxColumn colName;
private System.Windows.Forms.DataGridViewTextBoxColumn colRrp;
private System.Windows.Forms.DataGridViewTextBoxColumn colSellingPrice;
private System.Windows.Forms.DataGridViewTextBoxColumn colDiscount;
private System.Windows.Forms.DataGridViewTextBoxColumn colSavings;

using System;
using System.Collections.Generic;
using SoCPatterns.Layered.Model;
using SoCPatterns.Layered.Presentation;
using SoCPatterns.Layered.Service;
using StructureMap;

namespace SoCPatterns.Layered.WebUI
{
    public partial class Default : System.Web.UI.Page, IProductListView
    {
        private ProductListPresenter _productListPresenter;
        protected void Page_Init(object sender, EventArgs e)
        {
            _productListPresenter = new ProductListPresenter(this,ObjectFactory.GetInstance<Service.ProductService>());
            this.ddlCustomerType.SelectedIndexChanged +=
                delegate { _productListPresenter.Display(); };
        }
        protected void Page_Load(object sender, EventArgs e)
        {
            if(!Page.IsPostBack)
                _productListPresenter.Display();
        }
        public void Display(IList<ProductViewModel> products)
        {
            rptProducts.DataSource = products;
            rptProducts.DataBind();
        }
        public CustomerType CustomerType
        {
            get { return (CustomerType) int.Parse(ddlCustomerType.SelectedValue); }
        }
        public string ErrorMessage
        {
            set
            {
                lblErrorMessage.Text =
                    String.Format("<p><strong>Error:</strong><br/>{0}</p>", value);
            }
        }
    }
}

using System;
using System.Collections.Generic;
using System.Windows.Forms;
using SoCPatterns.Layered.Model;
using SoCPatterns.Layered.Presentation;
using SoCPatterns.Layered.Service;
using StructureMap;

namespace SoCPatterns.Layered.WinUI
{
    public partial class Form1 : Form, IProductListView
    {
        private ProductListPresenter _productListPresenter;
        public Form1()
        {
            InitializeComponent();
            _productListPresenter =
                new ProductListPresenter(this, ObjectFactory.GetInstance<Service.ProductService>());
            this.cmbCustomerType.SelectedIndexChanged +=
                delegate { _productListPresenter.Display(); };
            dgvProducts.AutoGenerateColumns = false;
            cmbCustomerType.SelectedIndex = 0;
        }
        public void Display(IList<ProductViewModel> products)
        {
            dgvProducts.DataSource = products;
        }
        public CustomerType CustomerType
        {
            get { return (CustomerType)cmbCustomerType.SelectedIndex; }
        }
        public string ErrorMessage
        {
            set
            {
                MessageBox.Show(
                    String.Format("Error:{0}{1}", Environment.NewLine, value));
            }
        }
    }
}

No. We don't have any plans to bundle .NET into the OS and we're trying really hard to avoid this. 

we want to explicitly recommend you against trying to update any applications you have in production to this preview. 

? What is Runtime Performance

To discuss any type of application performance, it’s important to define what we mean

The missing scope - Tenant-Singleton

If a singleton is created once per application, you can probably guess that a tenant-singleton is created once per tenant.

So when might you need this scope? Think of any object that is expensive to create or needs to maintain state yet should be isolated for each tenant. Good examples would be NHibernate's Session Factory, RavenDB's Document Store or ASP.NET's Memory Cache.