Count the number of element present in the sequence in LINQ?

// C# program to find total number of
// elements present in the given array
using System;
using System.Linq;

class GFG {

    // Main Method
    static public void Main()
    {

        // Data source
        int[] sequence = {6, 455, 50, 56, 102,
                          89, 9, 100, 67, 29};

        // Display the sequence
        Console.WriteLine("The sequence is: ");

        foreach(int s in sequence)
        {
            Console.WriteLine(s);
        }

        // Finding the total number of elements
        // present in the given sequence
        // Using Count function
        int result = sequence.Count();
        Console.WriteLine("Total number of Elements: {0}", result);
    }
}

// C# program to count the total
// number of the employees
using System;
using System.Linq;
using System.Collections.Generic;

// Employee details
public class Employee {

    public int emp_id
    {
        get;
        set;
    }

    public string emp_name
    {
        get;
        set;
    }

    public string emp_gender
    {
        get;
        set;
    }

    public string emp_hire_date
    {
        get;
        set;
    }

    public int emp_salary
    {
        get;
        set;
    }
}

class GFG {

    // Main method
    static public void Main()
    {
        List<Employee> emp = new List<Employee>() {
            new Employee() { emp_id = 209, emp_name = "Anjita", emp_gender = "Female", emp_hire_date = "12/3/2017", emp_salary = 20000 },
                new Employee() { emp_id = 210, emp_name = "Soniya", emp_gender = "Female", emp_hire_date = "22/4/2018", emp_salary = 30000 },
                new Employee() { emp_id = 211, emp_name = "Rohit", emp_gender = "Male", emp_hire_date = "3/5/2016", emp_salary = 40000 },
                new Employee() { emp_id = 212, emp_name = "Supriya", emp_gender = "Female", emp_hire_date = "4/8/2017", emp_salary = 40000 },
                new Employee() { emp_id = 213, emp_name = "Anil", emp_gender = "Male", emp_hire_date = "12/1/2016", emp_salary = 40000 },
                new Employee() { emp_id = 214, emp_name = "Anju", emp_gender = "Female", emp_hire_date = "17/6/2015", emp_salary = 50000 },
        };

        // Count the total number of employees
        // Using Count () method
        var res = (from e in emp
                       select e.emp_id)
                      .Count();

        Console.WriteLine("Total number of Employees: {0}", res);
    }
}