C# program to sort a list of string names using the LINQ OrderBy() method

Sorting a list of string names is a common task in programming, and the LINQ OrderBy() method in C# provides a simple and efficient way to perform this operation. In this article, we'll walk you through a C# program to sort a list of string names using the LINQ OrderBy() method.

What is the LINQ OrderBy() method?

LINQ The OrderBy() method is used to sort the elements in a sequence in ascending or descending order based on one or more keys. Keys can be simple properties or complex expressions that return a value based on one or more properties of the objects in the sequence.

OrderBy() method syntax

public static IOrderedEnumerable<TSource> OrderBy<TSource, TKey>(
   this IEnumerable<TSource> source,
   Func<TSource, TKey> keySelector
)

The first parameter is the source sequence to be sorted, and the second parameter is a function that returns the key used to sort each element. The return value is an ordered sequence of the same type as the source sequence.

Use the LINQ OrderBy() method to sort a list of string names

Let us consider an example of sorting a list of string names using the LINQ OrderBy() method.

Example

using System;
using System.Collections.Generic;
using System.Linq;

class Program {
   static void Main() {
      List<string> names = new List<string>() { "John", "Alice", "Peter", "Bob", "Mary" };
   
      var sortedNames = names.OrderBy(n => n);
   
      Console.WriteLine("Sorted Names:");
      foreach (var name in sortedNames) {
         Console.WriteLine(name);
      }
   }
}

Output

Sorted Names:
Alice
Bob
John
Mary
Peter

In this example, we create a list of string names called "names" and initialize it with some unsorted string names. We then use the OrderBy() method to sort the list in ascending order based on the value of each element.

lambda expression n => n is used as a key selector function, which simply returns the value of each element. The sorted list is stored in a new variable called "sortedNames".

Finally, we use a foreach loop to print the sorted list of string names to the console.

in conclusion

The LINQ OrderBy() method in

C# is a powerful tool for sorting a sequence of elements based on one or more keys. In this article, we showed how to sort a list of string names in ascending order using a lambda expression as a key selector using the OrderBy() method. This is just the tip of the iceberg of what LINQ and C# can do. By mastering LINQ, you can simplify your code, making it more efficient and easier to maintain.

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