Streamwriter C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;

namespace FileVersion
{
class FileVersionWriter
{

static stringsPath;
static string sFilePath;
static string sFile;
static string sFilePathCompare;

public static void NewFile()
{
sPath =@"C:\Users\Hector\Documents\C#\PruebasTexto\";
Console.WriteLine("Ingrese el nombre del archivo");
sFile = (Console.ReadLine());
string[] filePaths = Directory.GetFiles(sPath,"*.txt");
foreach (string sxFile in filePaths)
{
sFilePathCompare = (sPath + sFile + ".txt");
if (sFilePathCompare == sxFile)
{sFilePath = (@"C:\Users\Hector\Documents\C#\PruebasTexto\" + sFile);
if (Directory.Exists(sFilePath))
{string[] NewerVersions = Directory.GetFiles(sFilePath);
foreach (string Version in NewerVersions)
{
Console.Clear();Console.WriteLine(Version);
}
Console.WriteLine("Which Version will you like to update");
stringVersionToWrite = (Console.ReadLine() + ".txt");
String[] VersionFolder = Directory.GetFiles(sFilePath);
string Version1 =Convert.ToString(VersionFolder.Length);
sFilePath = (@"C:\Users\Hector\Documents\C#\PruebasTexto\" + sFile + VersionToWrite );
StreamReader VersionReader = new StreamReader(sFilePath);string sTextAnterior = VersionReader.ReadToEnd();
sFilePath = (@"C:\Users\Hector\Documents\C#\PruebasTexto\" + sFile + "\\" + VersionToWrite +...