Simple Ray Tracing in C# Part VI (Vertex Normal Interpolation)

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

namespace RayTracer
{
    public class Helpers
    {
        public static bool LoadTextFile(string sFilename, ref string sTextFromFile)
        {
            sTextFromFile = "";

            try
            {
                StreamReader oStreamReader = new StreamReader(sFilename);
                sTextFromFile = oStreamReader.ReadToEnd();
                oStreamReader.Close();
                oStreamReader.Dispose();
            }
            catch(Exception ex)
            {
                sTextFromFile = ex.ToString();
                return false;
            }
            return true;
        }

        public static bool SaveTextFile(string sFilename, string sText)
        {
            try
            {
                StreamWriter oStreamWriter = new StreamWriter(sFilename);
                oStreamWriter.Write(sText);
                oStreamWriter.Flush();
                oStreamWriter.Close();
                oStreamWriter.Dispose();
            }
            catch
            {
                return false;
            }
            return true;
        }

        public static string SaveTempFile(string sText)
        {
            string FileName = Path.GetTempFileName();
            FileStream File_Stream = new FileStream(FileName, FileMode.Append, FileAccess.Write);
            StreamWriter FileWriter = new StreamWriter(File_Stream);
            try
            {
                FileWriter.BaseStream.Seek(0, SeekOrigin.End);
                FileWriter.Write(sText);
            }
            catch (IOException)// ex)
            {
                //Debug.Assert(false, ex.ToString());
            }
            finally
            {
                FileWriter.Close();
            }
            return FileName;
        }

    }
}