Question

How to use name value collection (NameValueCollection ) in C#

Answer 1

using System;
using System.Collections.Specialized;
   
class Program
{
    static void Main() {
        NameValueCollection nvc = new NameValueCollection();
          
        nvc.Add("c#", "2");
        nvc.Add("c", "1");
        nvc.Add("php", "5");
        nvc.Add("java", "4");
        nvc.Add("python", "3");
         
        foreach (string key in nvc) {
            Console.WriteLine(nvc[key]);
        }
    }
}
  
   
   
/*
run:
   
2
1
5
4
3
   
*/

 

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Answer 2

using System;
using System.Linq;
using System.Collections.Specialized;
   
class Program
{
    static void Main() {
        NameValueCollection nvc = new NameValueCollection();
          
        nvc.Add("c#", "2");
        nvc.Add("c", "1");
        nvc.Add("php", "5");
        nvc.Add("java", "4");
        nvc.Add("python", "3");
         
        var items = nvc.AllKeys.SelectMany(nvc.GetValues, (k, v) => new {key = k, value = v});
        
        foreach (var item in items)
            Console.WriteLine(item.key + " - " + item.value);
    }
}
  
   
   
/*
run:
   
c# - 2
c - 1
php - 5
java - 4
python - 3
   
*/

 

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