# ThenBy va ThenByDescending

**ThenBy** ikkinchi tartibli saralash bo’lib avval saralangan ro’yhatni ikkinchi navbatda qaysi hususiyat bo’yicha sarlash kerak ekanligini bildiradi. Masalan avval familiya bo’yicha saralangan bo’lsa familiyasi bir xil insonlarni ismi bo’yicha saralash kerak bo’ladi shunday vaziyatlarda **ThenBy** dan foydalaniladi.

Method syntax:

```csharp
class Program
{
    static void Main(string[] args)
    {
            List<Employee> employees = new List<Employee>()
            {
                new Employee() { Id = 1, FirstName = "Muhammadkarim", Lastname = "To'xtaboyev"},
                new Employee() { Id = 2, FirstName = "Zokirjon", Lastname = "Xasanboyev" },
                new Employee() { Id = 3, FirstName = "Jasurbek", Lastname = "Xasanboyev" }
            };

            var MethodSyntax = employees.OrderBy(x => x.Lastname).ThenBy(x => x.FirstName);
            foreach (var emp in MethodSyntax)
            {
                Console.WriteLine($"{emp.Id} {emp.Lastname} {emp.FirstName}");
            }
            /* Output: 1 To'xtaboyev Muhammadkarim
                       3 Xasanboyev Jasurbek
                       2 Xasanboyev Zokirjon
            */

        }
    }
class Employee
{
    public int Id { get; set; }
    public string FirstName { get; set; }
    public string Lastname { get; set; }
}
```

Query syntax:

```csharp
class Program
{
    static void Main(string[] args)
    {
            List<Employee> employees = new List<Employee>()
            {
                new Employee() { Id = 1, FirstName = "Muhammadkarim", Lastname = "To'xtaboyev"},
                new Employee() { Id = 2, FirstName = "Zokirjon", Lastname = "Xasanboyev" },
                new Employee() { Id = 3, FirstName = "Jasurbek", Lastname = "Xasanboyev" }
            };

            var QuerySyntax = from emp in employees
                               orderby emp.Lastname,
                               emp.FirstName
                               select emp;
            foreach (var emp in QuerySyntax)
            {
                Console.WriteLine($"{emp.Id} {emp.Lastname} {emp.FirstName}");
            }
            /* Output: 1 To'xtaboyev Muhammadkarim
                       3 Xasanboyev Jasurbek
                       2 Xasanboyev Zokirjon
            */

        }
    }
class Employee
{
    public int Id { get; set; }
    public string FirstName { get; set; }
    public string Lastname { get; set; }
}
```

ThenByDescending ham huddi shu tartibda ishlatiladi lekin u ma’lumotlarni kamayish tartibida saralaydi.


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.dot-net.uz/c-.net/linq/thenby-va-thenbydescending.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.