Some extension methods for the object NameValueCollection

NameValueCollectionExtensions.cs

namespace System.Collections.Specialized
{
    using System.Collections.Generic;
    using System.Linq;
    using System.Net;

    public static class NameValueCollectionExtensions
    {
        public static IDictionary<string, string> ToDictionary(this NameValueCollection source)
        {
            return source.Cast<string>().Select(s => new { Key = s, Value = source[s] }).ToDictionary(p => p.Key, p => p.Value);
        }

        public static string ToQueryString(this NameValueCollection source)
        {
            return string.Concat("?", string.Join("&", ArrayEx.ConvertAll(source.AllKeys.ToArray(), key => string.Format("{0}={1}", HttpUtility.UrlEncode(key), HttpUtility.UrlEncode(source[key])))));
        }
    }
}