To find and print the digram (a pair of consecutive characters) that appears the most in a given string using C#.

Print the digram which appears maximum number of times in a string

A digram is a sequence of 2 consecutive characters

I/o - "asddaaasadedadaddasasasasas"

O/P - "as"

using System;

using System.Collections.Generic;

using System.Linq;

class Program

{

    static void Main()

    {

        string input = "asddaaasadedadaddasasasasas";

        Dictionary<string, int> digramCount = new Dictionary<string, int>();

        // Count all digrams in the string

        for (int i = 0; i < input.Length - 1; i++)

        {

            string digram = input.Substring(i, 2);

            if (digramCount.ContainsKey(digram))

                digramCount[digram]++;

            else

                digramCount[digram] = 1;

        }

        // Find the digram with maximum occurrences

        var maxDigram = digramCount.OrderByDescending(x => x.Value).First();

        Console.WriteLine($"\"{maxDigram.Key}\" appears {maxDigram.Value} times");

    }

}

Routing in Angular

1. What is Routing in Angular?

Routing allows you to navigate between views (components) in your Angular application using the URL. It manages:

• Browser navigation

• Lazy loading of modules/components

• Parameter passing via URLs

---

2. Basic Routing Setup

app.routes.ts (Angular 15+ standalone routing)

import { Routes } from '@angular/router';
import { HomeComponent } from './home/home.component';
import { AboutComponent } from './about/about.component';

export const routes: Routes = [
  { path: '', component: HomeComponent },
  { path: 'about', component: AboutComponent }
];

main.ts

import { bootstrapApplication } from '@angular/platform-browser';
import { AppComponent } from './app/app.component';
import { provideRouter } from '@angular/router';
import { routes } from './app/app.routes';

bootstrapApplication(AppComponent, {
  providers: [provideRouter(routes)],
});

---

 3. Using RouterOutlet

app.component.html

html
<h1>Angular 19 Routing</h1>
<router-outlet></router-outlet>

This acts as a placeholder where routed components will render.

---

4. Navigation with Links

html
<a routerLink="/">Home</a>
<a routerLink="/about">About</a>

Or programmatically:

ts

import { Router } from '@angular/router';

constructor(private router: Router) {}

goToAbout() {
  this.router.navigate(['/about']);
}

---

5. Route Parameters

Define route with params:

ts
{ path: 'user/:id', component: UserComponent }

Access it in UserComponent:

ts

import { ActivatedRoute } from '@angular/router';

constructor(private route: ActivatedRoute) {}

ngOnInit() {
  const id = this.route.snapshot.paramMap.get('id');
}

---

6. Lazy Loading with Standalone Components

Angular 15+ and Angular 19 make it easy to lazy load even standalone components:

ts

{ 
  path: 'lazy', 
  loadComponent: () => import('./lazy/lazy.component').then(m => m.LazyComponent) 
}

---

7. Route Guards (Optional)

Example for AuthGuard:

ts
{ 
  path: 'admin', 
  component: AdminComponent, 
  canActivate: [AuthGuard] 
}

---

8. Wildcard and Redirects

ts

{ path: '', redirectTo: 'home', pathMatch: 'full' },
{ path: '**', component: PageNotFoundComponent }

How to convert Alphabet to next one alphabet like input "ab" and output will be "bc"

 class Program

    {

        static void Main(string[] args)

        {

            Console.WriteLine(LetterChanges(Console.ReadLine()));

            Console.ReadLine();

        }

        public static string LetterChanges(string str)

        {

            string newString = "";

            char[] chr = str.ToCharArray();

            for (int i = 0; i < chr.Length; i++)

            {

                var chr1 = chr[i];

                bool result = chr1.ToString().All(x => char.IsLetter(x));

                if(result)

                {

                    char chr2 = (char)((int)chr1 + 1);

                    newString += chr2;

                }

                else

                {

                    char chr2 = (char)((int)chr1);

                    newString += chr2;

                }

             

            }

           return newString;

        }

    }

Output