LINQ Single() Method

In LINQ, the Single() method is used to return the single element from the collection, which satisfies the condition. In case, if the Single() method found more than one element in collection or no element in the collection, then it will throw the "InvalidOperationException" error.

Syntax of LINQ Single () Method

The syntax of using the LINQ Single () method to get a single element from the collection.

In the above syntax, we are getting the single element from the list using LINQ Single () method.

Example of LINQ Single () Method

Here is the example of the LINQ Single () method to get a single element from the collection.

using System;
using System. Collections;
using System.Collections.Generic;
using System. Linq;
using System. Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Programme2
    {
        static void Main(string[] args)
        {
//create an object objStudent of the class Student added the record to the list.
            List<Student> objStudent = new List<Student>()
            {
                new Student() { Name = "Shubham Rastogi", Gender = "Male",Location="Chennai" },
                new Student() { Name = "Rohini Tyagi", Gender = "Female", Location="Chennai" },
                new Student() { Name = "Praveen Alavala", Gender = "Male",Location="Bangalore" },
                new Student() { Name = "Sateesh Rastogi", Gender = "Male", Location ="Vizag"},
                new Student() { Name = "Madhav Sai", Gender = "Male", Location="Nagpur"}
            };
    //initialize the array objList
                int[] objList = { 1 };
    //objStudent.Single() used to select the student
                var user = objStudent.Single(s => s.Name == "Shubham Rastogi");
                string result = user.Name;
                int val = objList.Single();
                Console.WriteLine("Element from objStudent: {0}", result);
                Console.WriteLine("Element from objList: {0}", val);
                Console.ReadLine();
        }
    }
        class Student
        {
           public string Name { get; set; }
           public string Gender { get; set; }
           public string Location { get; set; }
        }
}

From the above example, we are getting the single element from the collection "objStudent" using the LINQ Single() operator.

OUTPUT: