public class PublicMenu : BaseEntity
    {
        public PublicMenu()
        {
            SubMenus = new List<PublicMenu>();
        }

        public string Title { get; set; }
        public string Url { get; set; }
        public string Icon { get; set; }
        public bool IsShow { get; set; }

        public virtual PublicMenu Menu { set; get; }
        public int? MenuId { get; set; }
        public ICollection<PublicMenu> SubMenus { get; set; }
    }

import { Component, Input, OnInit } from '@angular/core';
import { AbstractControl } from '@angular/forms';

@Component({
  selector: 'validation-message',
  template: `
    <ng-container *ngIf="control.invalid && control.touched">
      {{ message }}
    </ng-container>
  `
})
export class ValidationMessageComponent implements OnInit {
  @Input() control: AbstractControl;
  @Input() fieldDisplayName: string;
  @Input() rules: { [key: string]: string };

  get message(): string {
    return this.control.hasError('required')
      ? `${this.fieldDisplayName} را وارد نمائید.`
      : this.control.hasError('pattern')
      ? `${this.fieldDisplayName} را به شکل صحیح وارد نمائید.`
      : this.control.hasError('email')
      ? `${this.fieldDisplayName} را به شکل صحیح وارد نمائید.`
      : this.control.hasError('minlength')
      ? `${this.fieldDisplayName} باید بیشتر از  ${
          this.control.errors.minlength.requiredLength
        } کاراکتر باشد.`
      : this.control.hasError('maxlength')
      ? `${this.fieldDisplayName} باید کمتر از  ${
          this.control.errors.maxlength.requiredLength
        } کاراکتر باشد.`
      : this.control.hasError('min')
      ? `${this.fieldDisplayName} باید بیشتر از  ${
          this.control.errors.min.requiredLength
        } باشد.`
      : this.control.hasError('max')
      ? `${this.fieldDisplayName} باید کمتر از  ${
          this.control.errors.max.requiredLength
        } باشد.`
      : this.hasRule()
      ? this.findRule()
      : this.control.hasError('model')
      ? `${this.control.errors.model.messages[0]}`
      : '';
  }
  constructor() {}

  private hasRule() {
    return (
      this.rules &&
      Object.keys(this.control.errors).some(ruleKey =>
        this.rules[ruleKey] ? true : false
      )
    );
  }

  private findRule(): string {
    let message = '';
    Object.keys(this.control.errors).forEach(ruleKey => {
      if (this.rules[ruleKey]) {
        message += `${this.rules[ruleKey]} `;
      }
    });

    return message;
  }

  ngOnInit(): void {}
}

 <mat-error *ngIf="form.controls['userName'].invalid && form.controls['userName'].touched" 
 class="mat-text-warn">
    <validation-message
        [control]="form.controls['userName']"
        fieldDisplayName="نام کاربری"
        [rules]="{rule1:'پیغام متناظر با rule1'}">
    </validation-message>
</mat-error>

Persian Jalali datepicker for Angular Material - dependent on (material, cdk, moment-jalaali)

> ng new ASPNETCore2JwtAuthentication.AngularClient --routing

> npm install bootstrap --save

  "apps": [
    {
      "styles": [
    "../node_modules/bootstrap/dist/css/bootstrap.min.css",
        "styles.css"
      ],

>ng g c welcome
>ng g c PageNotFound

@NgModule({
  declarations: [
    AppComponent,
    WelcomeComponent,
    PageNotFoundComponent
  ],

import { PageNotFoundComponent } from './page-not-found/page-not-found.component';
import { WelcomeComponent } from './welcome/welcome.component';
import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
const routes: Routes = [
  { path: 'welcome', component: WelcomeComponent },
  { path: '', redirectTo: 'welcome', pathMatch: 'full' },
  { path: '**', component: PageNotFoundComponent }
];
@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }

>ng g m Authentication -m app.module --routing

  create src/app/authentication/authentication-routing.module.ts (257 bytes)
  create src/app/authentication/authentication.module.ts (311 bytes)
  update src/app/app.module.ts (696 bytes)

import { EmployeeRoutingModule } from './employee/employee-routing.module';
@NgModule({
  imports: [
    BrowserModule,
    AppRoutingModule,
    AuthenticationModule
  ]

import { EmployeeModule } from './employee/employee.module';
@NgModule({
  imports: [
    BrowserModule,
    AuthenticationModule,
    AppRoutingModule 
  ]

>ng g c Authentication/Login

  create src/app/Authentication/login/login.component.html (24 bytes)
  create src/app/Authentication/login/login.component.ts (265 bytes)
  create src/app/Authentication/login/login.component.css (0 bytes)
  update src/app/Authentication/authentication.module.ts (383 bytes)

import { LoginComponent } from "./login/login.component";

@NgModule({
  declarations: [LoginComponent]
})

import { LoginComponent } from "./login/login.component";

const routes: Routes = [
  { path: "login", component: LoginComponent }
];

import { NgModule, SkipSelf, Optional, } from "@angular/core";
import { CommonModule } from "@angular/common";
import { RouterModule } from "@angular/router";

// import RxJs needed operators only once
import "./services/rxjs-operators";

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

@NgModule({
  imports: [CommonModule, RouterModule],
  exports: [
    // components that are used in app.component.ts will be listed here.
  ],
  declarations: [
    // components that are used in app.component.ts will be listed here.
  ],
  providers: [
    // global singleton services of the whole app will be listed here.
    BrowserStorageService
  ]
})
export class CoreModule {
  constructor( @Optional() @SkipSelf() core: CoreModule) {
    if (core) {
      throw new Error("CoreModule should be imported ONLY in AppModule.");
    }
  }
}

import { NgModule, ModuleWithProviders } from "@angular/core";
import { CommonModule } from "@angular/common";

@NgModule({
  imports: [
    CommonModule
  ],
  entryComponents: [
    // All components about to be loaded "dynamically" need to be declared in the entryComponents section.
  ],
  declarations: [
    // common and shared components/directives/pipes between more than one module and components will be listed here.
  ],
  exports: [
    // common and shared components/directives/pipes between more than one module and components will be listed here.
    CommonModule
  ]
  /* No providers here! Since they’ll be already provided in AppModule. */
})
export class SharedModule {
  static forRoot(): ModuleWithProviders {
    // Forcing the whole app to use the returned providers from the AppModule only.
    return {
      ngModule: SharedModule,
      providers: [ /* All of your services here. It will hold the services needed by `itself`. */]
    };
  }
}

import { FormsModule } from "@angular/forms";
import { HttpClientModule } from "@angular/common/http";

import { CoreModule } from "./core/core.module";
import { SharedModule } from "./shared/shared.module";

@NgModule({
  imports: [
    BrowserModule,
    FormsModule,
    HttpClientModule,
    CoreModule,
    SharedModule.forRoot(),
    AuthenticationModule,
    AppRoutingModule
  ]
})
export class AppModule { }

> ng g c Header

  create src/app/header/header.component.html (25 bytes)
  create src/app/header/header.component.ts (269 bytes)
  create src/app/header/header.component.css (0 bytes)
  update src/app/app.module.ts (1069 bytes)

<nav>
  <div>
    <div>
      <a [routerLink]="['/']">{{title}}</a>
    </div>
    <ul>
      <li role="menuitem" routerLinkActive="active" [routerLinkActiveOptions]="{ exact: true }">
        <a [routerLink]="['/welcome']">Home</a>
      </li>
      <li role="menuitem" routerLinkActive="active">
        <a queryParamsHandling="merge" [routerLink]="['/login']">Login</a>
      </li>
    </ul>
  </div>
</nav>

export class HeaderComponent implements OnInit {
    title = "Angular.Jwt.Core";

<app-header></app-header>
<div>
  <router-outlet></router-outlet>
</div>

import { HeaderComponent } from "./component/header/header.component";

@NgModule({
  exports: [
    // components that are used in app.component.ts will be listed here.
    HeaderComponent
  ],
  declarations: [
    // components that are used in app.component.ts will be listed here.
    HeaderComponent
  ]
})
export class CoreModule {

Completed Angular Material tutorial with practical examples.
discussed points :
- angular material form design with validation
- angular material datatable
- popup dialog
- notification tool
- crud operations