using System;

using System.Linq;

using System.Xml;                   

using System.Xml.Linq;

using System.Collections; 

using System.Collections.Generic;

using System.Data;

using System.Data.DataSetExtensions;

using System.Data.Linq;

using System.Text;

using System.Text.RegularExpressions;

using System.Xml.Serialization; 

using System.IO;

using System.Globalization;

using System.Diagnostics;

​

​

public class Program

{

​

    public static void Main()

    {

        string[][] data = new string[3][];

​

​

        data[0] = new string[2];

        data[0][0] = "EUG5";            

        data[0][1]= "FA1"; 

        data[1] = new string[2];

        data[1][0]= "9.000000"; 

        data[1][1]= "1000";  

        data[2] = new string[2];

        data[2][0]= "1"; 

        data[2][1]= "0"; 

        data.Dump();    

        data = data

            .Select(x=> data[2][1] == "0"? 

                    x.Take(1).ToArray() 

                    : x.ToArray())

            .ToArray();

            data.Dump();

    }

​

}