/*Group Strings by Their First Character Using LINQ

Problem Statement:

Write a function that takes a list of strings and groups them by their first character using LINQ.

Example:

•   Input: ["apple", "banana", "avocado", "blueberry", "cherry","priyanka"]

•   Output:

a: apple, avocado

b: banana, blueberry

c: cherry

​

*/

using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        List<string> strings = new List<string> { "apple", "banana", "avocado", "blueberry", "cherry","priyanka" };

        var result = GroupStringsByFirstCharacter(strings);

​

        foreach (var kvp in result)

        {

           Console.WriteLine($"{kvp.Key}: {string.Join(", ", kvp.Value)}");

        }

​

    }

    private static Dictionary<char, List<string>> GroupStringsByFirstCharacter(List<string> strings)

    {

        return strings.GroupBy(s => s[0])

                      .ToDictionary(g => g.Key, g => g.ToList());

    }

}

​

​