For decades, passwords have been the common backbone (headache) of authentication and are well known to lack in security while being frustrating and difficult to use. As we continue to see daily data breaches, the reality of moving away from weak static credentials and killing the password is upon us. Join this session to learn how FIDO2 and WebAuthn open authentication standards, in conjunction with YubiKeys, are solving the elimination of passwords at scale. Hear how organizations like Microsoft have implemented these standards for a true passwordless experience and find out how your organization can follow suit. You'll gain a greater understanding of how to achieve a modern and flexible security architecture through the use of FIDO open standards and hardware authenticators. 

- “A programmer is not a PC repair man.” — Ritesh Kumar Gupta
- A parent may kill its children if the task assigned to them is no longer needed

ردیابی تغییرات اعمال شده بر روی خصوصیت 

<app-customer-info FormIsReadOnly="true"></app-customer-info>

@Component({
    selector: 'app-customer-info',
    templateUrl: './customer-info.component.html',
    styleUrls: ['./customer-info.component.css']
})
export class CustomerInfoComponent implements OnInit {
    private _formIsReadOnly: boolean;

    @Input()
    set FormIsReadOnly(value: boolean) {
        if (typeof (value) != 'boolean')
            throw new Error(`${value} type is not boolean.`);
        this._formIsReadOnly = value;
    }

    get FormIsReadOnly(): boolean { return this._formIsReadOnly; }

    constructor() { }

    ngOnInit() {
    }
}

import { Component, OnInit, Input, OnChanges, SimpleChange } from '@angular/core';
import { ICustomerInfo } from '../../core/model/ICustomerInfo';

@Component({
    selector: 'app-customer-info',
    template: '<ul>< li *ngFor="let change of changeLog">{{change }}</li></ul>',
    styleUrls: ['./customer-info.component.css']
})
export class CustomerInfoComponent implements OnChanges {
    changeLog: string[] = [];

    @Input() FormIsReadOnly: boolean;

    ngOnChanges(changes: { [propKey: string]: SimpleChange }) {
        let log: string[] = [];
        for (let propName in changes) {
            let changedProp = changes[propName];
            let to = JSON.stringify(changedProp.currentValue);
            if (changedProp.isFirstChange()) {
                log.push(`Initial value of ${propName} set to ${to}`);
            } else {
                let from = JSON.stringify(changedProp.previousValue);
                log.push(`${propName} changed from ${from} to ${to}`);
            }
        }
        this.changeLog.push(log.join(', '));
    }

    constructor() { }
}

•    Initial value of FormIsReadOnly set to true
•    FormIsReadOnly changed from true to "trued"
•    FormIsReadOnly changed from "trued" to "true"
•    FormIsReadOnly changed from "true" to "truef"
•    FormIsReadOnly changed from "truef" to "true"
•    FormIsReadOnly changed from "true" to "tru"
•    FormIsReadOnly changed from "tru" to "tr"
•    FormIsReadOnly changed from "tr" to "t"
•    FormIsReadOnly changed from "t" to ""
•    FormIsReadOnly changed from "" to "t"
•    FormIsReadOnly changed from "t" to "tr"
•    FormIsReadOnly changed from "tr" to "tru"
•    FormIsReadOnly changed from "tru" to "true"

public class Parent
{
  public Parent()
  {
            Console.WriteLine("Parent Constructor");
  }
  public void Print()
  {
            Console.WriteLine("Parent Print");
  }


}

public class Child : Parent
{
  public Child()
  {
           Console.WriteLine("Child Constructor");
  }

  public void Print()
  {
           Console.WriteLine("Child Print");
  }
}

 public new void Print()
  {
     Console.WriteLine("Child Print");
  }

Console.WriteLine("====Parent====");
Parent parent = new Parent();
parent.Print();

Console.WriteLine("====Child====");
Child child = new Child();
child.Print();

Console.WriteLine("====Parent Via Child====");
Parent pc = new Child();
pc.Print();

  public class Parent
{
  public Parent()
  {
Console.WriteLine("Parent Constructor");
  }

  public virtual void  Print()
  {
Console.WriteLine("Parent Print");
  }
}

public class Child : Parent
{
  public Child()
  {
Console.WriteLine("Child Constructor");
  }

  public override void Print()
  {
Console.WriteLine("Child Print");
  }
}

   public class Parent
{
  static Parent()
  {
Console.WriteLine("Parent static Constructor");
  }
  public Parent()
  {
Console.WriteLine("Parent Constructor");
  }

  public virtual void  Print()
  {
Console.WriteLine("Parent Print");
  }
}

public class Child : Parent
{
  static Child()
  {
Console.WriteLine("Child static Constructor");
  }
  public Child()
  {
Console.WriteLine("Child Constructor");
  }

  public override void Print()
  {
Console.WriteLine("Child Print");
  }

At Microsoft Build 2021 .NET MAUI Preview 4 was launched. This version is already pretty complete and starts to reflect what the end result is going to look like. In this video I will show you the new .NET MAUI template in Visual Studio 2019 and walk you through the Weather 21 demo app.  

import { SpecialCollection } from "../../special";
import { LoginComponent } from "../login";
import { TextUtils } from ".../../utils/text";
import { Router } from "../../../core/router";

import { Data } from '../data';

import { Data } from '../../../data';

import { BrowserStorageService } from "./../../core/browser-storage.service";

{
  "compilerOptions": {
    "baseUrl": "src",
    "paths": {
      "@app/*": [
        "app/*"
      ],
      "@app/core/*": [
        "app/core/*"
      ],
      "@app/shared/*": [
        "app/shared/*"
      ],
      "@env/*": [
        "environments/*"
      ]
    }
  }
}

 import { BrowserStorageService } from "@app/core/browser-storage.service";

 import { BrowserStorageService } from "./../../core/browser-storage.service";

 import { Component } from '@angular/core';

"paths": {
    "@angular/*": ["node_modules/@angular/*"]
},

resolve: {
  extensions: ['*', '.js', '.ts'],
  modules: [
    rootDir,
    path.join(rootDir, 'node_modules')
  ],
  alias: {
    '@app': 'src/app'
  }
},

import { BrowserStorageService } from "./../../core/browser-storage.service";

import { BrowserStorageService } from "@app/core/browser-storage.service";

import { BrowserStorageService } from "@app/core";

export * from "./browser-storage.service";
export * from "./app-config.service";
export * from "./seo-service";

1. Debugging WPF Applications
2. Stepping Through Code
3. Working with Debug Windows
4. Debugger Visualizers and Trace Listeners
5. XAML Debugging
6. Analyzing the UI Performances
7. Analyzing the Application Performances 

A set of composable and extensible Angular 2 directives for building SVGs with D3 declaritively. This library provides functionality for basic charts out of the box, but it can be easily extended to support building declarative syntaxes for just about any SVG generated by D3.  Demo