Query by position : Index « LINQ « C# / C Sharp

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Query by position
 
using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.Linq;
using System.Reflection;

class Person {
    int _id;
    int _idRole;
    string _lastName;
    string _firstName;

    public int ID {
        get return _id; }
        set _id = value; }
    }

    public int IDRole {
        get return _idRole; }
        set _idRole = value; }
    }

    public string LastName {
        get return _lastName; }
        set _lastName = value; }
    }

    public string FirstName {
        get return _firstName; }
        set _firstName = value; }
    }
}
class Program {
    static void Main(string[] args) {
        List<Person> people = new List<Person> {
               new Person ID = 1, IDRole = 1, LastName = "A", FirstName = "B"},
               new Person ID = 2, IDRole = 2, LastName = "G", FirstName = "T"},
               new Person ID = 3, IDRole = 2, LastName = "G", FirstName = "M"},
               new Person ID = 4, IDRole = 3, LastName = "C", FirstName = "G"}
            };
        var query = people.Select((p, index=> new Position = index, p.FirstName, p.LastName });
    }
}

 
Related examples in the same category
1.Use an indexed Where clause (where the length of the number's name is shorter than its value)
2.Select - Indexed: prints the value of the integer and whether it matches its index in the array
3.Use index when querying array with LINQ
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