Program:

The source code to find the list of students whose name starts with 'S', is given below. The given program is compiled and executed successfully on Microsoft Visual Studio.

//C# program to find a list of students whose name starts 
//with 'S' using Where() method of List collection using Linq.

using System;
using System.Collections.Generic;
using System.Linq;

class Demo
{
    static void Main(string[] args)
    {
        List<string> Students = new List<string>();

        Students.Add("Amit");
        Students.Add("Sumit");
        Students.Add("Ayan");
        Students.Add("Shaurya");
        Students.Add("Sanaya");

        IEnumerable<string> result = Students.Where(stu=>stu[0]=='S');

        Console.WriteLine("Student Names start with 'S':");
        foreach (string name in result)
        {
            Console.WriteLine(name);
        }
    }
}

Output:

Student Names start with 'S':
Sumit
Shaurya
Sanaya
Press any key to continue . . .

Explanation:

In the above program, we created a list and then add student names to the using Add() method.

IEnumerable<string> result = Students.Where(stu=>stu[0]=='S');

In the above code, where() method is used to select student according to a specified condition. Here we find the students whose name starts with 'S'.

Console.WriteLine("Student Names start with 'S':");
foreach (string name in result)
{
    Console.WriteLine(name);
}

Here we printed the select student name using the "foreach" on the console screen.