using System;

using System.IO;

using System.Net;

public class Program

{

    public void Main()

    {

        Console.WriteLine("Data download test");

        Console.WriteLine("---");

        //TODO

        //Read the current version of the TSV file here.

        String currentVersion = "1.0";

        //Pass the currentVersion into our method

        if (CheckAndApplyUpdate(currentVersion)) 

        {

            //everything was ok, start program

        }

        else {

            //The check failed for some reason, show box to retry?

        }

    }

    public bool CheckAndApplyUpdate(String currentVersion) 

    {

        //Wrap call in a using statement, to auto handle disposal.

        using(WebClient client = new WebClient())

        {

            //Wrap call in a try catch, there could be lots of reasons why this fails (path wrong, no internet, bad internet, etc)

            try 

            {

                //Obtain a stream to the text file

                Stream stream = client.OpenRead("https://raw.githubusercontent.com/bigzz/linux/master/Documentation/arm/VFP/release-notes.txt");

                //Pass the stream to a streamreader

                StreamReader reader = new StreamReader(stream);

                //Read the first line of the file

                String tsvFile = reader.ReadLine() + Environment.NewLine;

​

                if (currentVersion.Equals(tsvFile)) 

                {

                    //Versions are the same, nothing else to do.

                    reader.Close();

                    return true;

                }

                else 

                {

                    //Versions are not the same, lets download the rest of the file

                    while (!reader.EndOfStream)

                        {

                            // Read the rest of the file

                            tsvFile += reader.ReadToEnd();

                            // Dump the file to the console

                            Console.WriteLine(tsvFile);

                        }   

                    //Now, attempt to write the file to the file system, if this fails false will be returned to the caller

                    return writeFile(tsvFile);

                }

            }

            catch (Exception e)

            {

                //Something has gone wrong.

                Console.WriteLine(e);

                return false;

            }

    }   

}

    public bool writeFile(String tsv) 

    {

        try 

        {

            string path = @"c:\path to install tool\tsv.txt";

            File.WriteAllText(path, tsv);

            return true;

        }

        catch (Exception e)

        {

            //Something has gone wrong.

            Console.WriteLine("file write error:" + e);

            return false;

        }   

    }

}