It is required to output a list of employees receiving the maximum salary in their department.

To output a list of employees receiving the highest salary in their department, you can use LINQ with grouping by departments and selecting employees with the maximum salary in each group.

Example in C#:

class Employee
{
    public int Id { get; set; }
    public string Name { get; set; }
    public string Department { get; set; }
    public decimal Salary { get; set; }
}

var employees = new List<Employee>
{
    new Employee { Id = 1, Name = "Ivan", Department = "IT", Salary = 100000 },
    new Employee { Id = 2, Name = "Maria", Department = "IT", Salary = 120000 },
    new Employee { Id = 3, Name = "Peter", Department = "HR", Salary = 90000 },
    new Employee { Id = 4, Name = "Olga", Department = "HR", Salary = 90000 },
};

var topEarners = employees
    .GroupBy(e => e.Department)
    .SelectMany(g => 
    {
        var maxSalary = g.Max(e => e.Salary);
        return g.Where(e => e.Salary == maxSalary);
    });

foreach (var emp in topEarners)
{
    Console.WriteLine($"{emp.Name} from {emp.Department} with salary {emp.Salary}");
}

This code groups employees by departments, finds the maximum salary in each group, and selects all employees with that salary.