> For the complete documentation index, see [llms.txt](https://raviram.gitbook.io/c-programing/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://raviram.gitbook.io/c-programing/linq/method-select.md).

# Method Select

## Select() Method

Select() takes each source element, transforms it, and returns a sequence of the transformed values as requested by the condition

#### Let’s see a query to show only the student cities

```csharp
List<Student> students = new List<Student>()
{
    new Student("Sam","Mysore"),
    new Student("Ted","Delhi"),
    new Student("Sam","Bangalore"),            
    new Student("Raj","Mumbai"),
    new Student("Adhin","Hyderabad"),
    new Student("Raj","Indore"),            
    new Student("Bhuvan","Chennai"),
    new Student("Sam","Banaras"),
};

var cities = students.Select(s=>s.City);

foreach (string c in cities)
    Console.WriteLine(n);
```

#### We can also select a property of each element!

```csharp
var strings = new List<string> { "one", "two", "three", "four" };
  
var result = strings.Select(str => str.Length);
 
foreach(var x in result)
  Console.WriteLine(x);
```

### SelectMany()

The SelectMany() method is used to "flatten" a sequence in which each of the elements of the sequence is a separate, subordinate sequence.

#### We can turn a two-dimensional array into a single sequence of values, as shown in this example

```csharp
int[][] arrays = {
    new[] {1, 2, 3},
    new[] {4},
    new[] {5, 6, 7, 8},
    new[] {12, 14}
};
// Will return { 1, 2, 3, 4, 5, 6, 7, 8, 12, 14 }
IEnumerable<int> result = arrays.SelectMany(array => array); // we can use var as well
```