> For the complete documentation index, see [llms.txt](https://docs.dot-net.uz/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.dot-net.uz/c-.net/linq/set-operatsiyasi/union.md).

# Union

Union operatori berilgan ikkita to’plamni qo’shib dublikatlardan holi bo’lgan yangi to’plam hosil qilish uchun ishlatiladi.

![](https://user-images.githubusercontent.com/91861166/222968134-954cfb45-f7b4-46e1-abca-5c2295851747.png)

Masalan:

```csharp
IList<string> strList1 = new List<string>() { "One", "Two", "three", "Four" };
IList<string> strList2 = new List<string>() { "Two", "THREE", "Four", "Five" };

var result = strList1.Union(strList2);

foreach(string str in result)
        Console.WriteLine(str);
```

Output:

```
One
Two
Three
THREE
Four 
Five
```

Union operatori murakkab datatypelar toʻplami uchun toʻgʻri natijani qaytarmaydi.

Bu shuni anglatadiki, biz murakkab ma'lumotlar turlari bilan ishlayotganimizda, kutilganidek natijani olish uchun **IEqualityComparer** interfeysini implement qilishimiz kerak.

Students class uchun IEqualityComparer interfeysini quyidagi tarzda implement qilish mumkin :

```csharp
public class Student 
{
    public int StudentID { get; set; }
    public string StudentName { get; set; }
    public int Age { get; set; }
}

class StudentComparer : IEqualityComparer<Student>
{
    public bool Equals(Student x, Student y)
    {
        if (x.StudentID == y.StudentID && x.StudentName.ToLower() == y.StudentName.ToLower())
            return true;

        return false;
    }

    public int GetHashCode(Student obj)
    {
        return obj.StudentID.GetHashCode();
    }
}
```

Endi to'g'ri natijaga erishish uchun Union metodi usulida StudentComparer sinfidan foydalanishimiz mumkin:

```csharp
IList<Student> studentList1 = new List<Student>() { 
        new Student() { StudentID = 1, StudentName = "John", Age = 18 } ,
        new Student() { StudentID = 2, StudentName = "Steve",  Age = 15 } ,
        new Student() { StudentID = 3, StudentName = "Bill",  Age = 25 } ,
        new Student() { StudentID = 5, StudentName = "Ron" , Age = 19 } 
    };

IList<Student> studentList2 = new List<Student>() { 
        new Student() { StudentID = 3, StudentName = "Bill",  Age = 25 } ,
        new Student() { StudentID = 5, StudentName = "Ron" , Age = 19 } 
    };

var resultedCol = studentList1.Union(studentList2, new StudentComparer()); 

foreach(Student std in resultedCol)
    Console.WriteLine(std.StudentName);
```

Output:

```
John
Steve
Bill
Ron
```

Union operatori C# va VB.Net Query sintaksisida qo'llab-quvvatlanmaydi.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## 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, and the optional `goal` query parameter:

```
GET https://docs.dot-net.uz/c-.net/linq/set-operatsiyasi/union.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

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.