using System;

using System.Collections.Generic;

using System.Linq;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        string json = @"

            {

              ""?xml"": {

                ""@version"": ""1.0"",

                ""@encoding"": ""UTF-8"",

                ""@standalone"": ""yes""

              },

              ""Grid"": {

                ""DataRow"": [

                  {

                    ""DataItem"": [

                      {

                        ""@name"": ""SYMBOL"",

                        ""#text"": ""005930""

                      },

                      {

                        ""@name"": ""NAME"",

                        ""#text"": ""Samsung Electronics""

                      },

                      {

                        ""@name"": ""PRICE"",

                        ""#text"": ""1004.3""

                      },

                      {

                        ""@name"": ""VOLUME"",

                        ""#text"": ""273.182""

                      },

                      {

                        ""@name"": ""AGG_VOLUME"",

                        ""#text"": ""302.894""

                      }

                    ]

                  },

                  {

                    ""DataItem"": [

                      {

                        ""@name"": ""SYMBOL"",

                        ""#text"": ""AAPL""

                      },

                      {

                        ""@name"": ""NAME"",

                        ""#text"": ""Apple Inc.""

                      },

                      {

                        ""@name"": ""PRICE"",

                        ""#text"": ""99""

                      },

                      {

                        ""@name"": ""VOLUME"",

                        ""#text"": ""32936.4""

                      },

                      {

                        ""@name"": ""AGG_VOLUME"",

                        ""#text"": ""33078.769""

                      }

                    ]

                  },

                  {

                    ""DataItem"": [

                      {

                        ""@name"": ""SYMBOL"",

                        ""#text"": ""MSFT""

                      },

                      {

                        ""@name"": ""NAME"",

                        ""#text"": ""Microsoft Corporation""

                      },

                      {

                        ""@name"": ""PRICE"",

                        ""#text"": ""42""

                      },

                      {

                        ""@name"": ""VOLUME"",

                        ""#text"": ""103441.6""

                      },

                      {

                        ""@name"": ""AGG_VOLUME"",

                        ""#text"": ""1324432.074""

                      }

                    ]

                  }

                ]

              }

            }";

        JObject feed = JObject.Parse(json);

        List<string> symbols = 

            feed.SelectToken("Grid.DataRow")

                .SelectMany(jt => jt["DataItem"])

                .Where(jt => (string)jt["@name"] == "SYMBOL")

                .Select(jt => (string)jt["#text"])

                .ToList();  

        byte[] ddd=System.Convert.FromBase64String("UDFU");

        string val=System.Text.Encoding.ASCII.GetString(ddd);

        Console.WriteLine(val);

    }

​

}