去註釋和去空格

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

namespace 去處註釋行
{
    class Program
    {
        static void ReadFileInfo(string path, List<string> info)
        {

            string str = string
 
.Empty;
            using (StreamReader reader = new StreamReader(path,Encoding.UTF8))
            {
                while ((str = reader.ReadLine()) != null)
                {
                    if(!string.IsNullOrEmpty(str))
                    {
                        if (str.Trim().Length != 0) // 不是空行
 

                        {


                            if ( str.IndexOf("//") != 0) // 有//  但是不確定啊  ***// -->       "//" *** //
                            {
                              //沒有雙引號就取消註釋
                                if (str.IndexOf("//") != -1 && !str.Contains('"'))
                                {
                                    //   文字 //
 

                                    //
                                    str = str.Substring(0, str.IndexOf("//"));
                                    if(str.Trim().Length != 0)
                                    info.Add(str);

                                }
                                //              純文字 有雙引號
                                else
                                {
                                    info.Add(str);

                                }
                             }

                        }
                    }
                }
            }
        }

        static void WriteFileInfo(string path, List<string> info)
        {
            using (StreamWriter writer = new StreamWriter(path,false,Encoding.UTF8))
            {
                for (int i = 0; i < info.Count; i++)
                {
                   writer.WriteLine(info[i]);
                }
                writer.WriteLine("//by 自動去除註釋行工具");
            }
        }
        static void Main(string[] args)
        {
            //開啟
            Console.WriteLine("取消註釋前請保留一份,操作有風險.....");
            List<string> list = new List<string>();
            string path = Console.ReadLine();

            string rePath = path.Insert(path.Length, ".bak");
            if (File.Exists(rePath))
            {
                File.Delete(rePath);
            }
            File.Copy(path,rePath);



            ReadFileInfo(path,list);

            //寫入
            WriteFileInfo(path,list);
        }
    }
}

將1.txt文字內容計算結果寫入2.txt文字

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

namespace 讀檔案 { class Program { static bool CheckNumber(string str) { bool returnValue = true; for (int i = 0; i < str.Length; i++) { if (!char.IsDigit(str[i])) { returnValue = false; break;

            }
        }
        return returnValue;
    }
    static bool IsNumber(string number01, string number02)
    {
        bool returnValue = true;
        if (! (CheckNumber(number01) && CheckNumber(number02)))
        {
            returnValue = false;

        }
        return returnValue;
    }
    static void CalcNumberByOper(string[] infos, out string finalStr)
    {
        finalStr = string.Empty;
        long Number01 = Convert.ToInt64(infos[0]);
        long Number02 = Convert.ToInt64(infos[2]);
        switch (infos[1])
        {
            case "+":
                //字串的格式化 就是把N個東東按照規則拼成一個字串
                finalStr = string.Format("{0} {1} {2} {3} {4}", infos[0], infos[1], infos[2], infos[3], Number01+Number02);
                break;
            case "-":
                finalStr = string.Format("{0} {1} {2} {3} {4}", infos[0], infos[1], infos[2], infos[3], Number01 - Number02);

                break;
            case "*":
                finalStr = string.Format("{0} {1} {2} {3} {4}", infos[0], infos[1], infos[2], infos[3], Number01 * Number02);

                break;
            case "/":
                if (Number02 == 0)
                {
                finalStr = string.Format("{0} {1} {2} {3} {4}", infos[0], infos[1], infos[2], infos[3], "除數不能為0");

                }
                else
                {
                finalStr = string.Format("{0} {1} {2} {3} {4}", infos[0], infos[1], infos[2], infos[3], Number01/Number02);

                }
                break;
            case "%":
                if (Number02 == 0)
                {
                    finalStr = string.Format("{0} {1} {2} {3} {4}", infos[0], infos[1], infos[2], infos[3], "除數不能為0");

                }
                else
                {
                    finalStr = string.Format("{0} {1} {2} {3} {4}", infos[0], infos[1], infos[2], infos[3], Number01 % Number02);

                }
                break;
        }

    }
    /// <summary>
    /// 通過將分割之後資料進行分析判斷返回一個結果 10+20 = 30 
    /// </summary>
    /// <param name="infos">分割之後的東東  N1 OPE N2 = </param>
    /// <returns></returns>
    static string CalcStringArray(string[] infos)
    {
        string returnValue = string.Empty;
        if (! IsNumber(infos[0], infos[2]))
        {
            returnValue = string.Format("{0} {1} {2} {3} {4}", infos[0], infos[1], infos[2], infos[3], "原始檔不是數字");
            goto retTip;
        }
        CalcNumberByOper(infos,out returnValue);

        retTip:
        return returnValue;
    }
    // 讀檔案
    // 儲存檔案資料的 -->List<string> fileInfo
    static void ReadFileToList(string filePath, List<string> fileInfo)
    {
        string tmpStr = string.Empty;
        using (StreamReader reader = new StreamReader(filePath,Encoding.UTF8))
        {
            while ((tmpStr = reader.ReadLine()) != null)
            {
                if(!string.IsNullOrEmpty(tmpStr))
                fileInfo.Add(tmpStr);
            }
        }
        Console.WriteLine("測試 讀取資料{0}行",fileInfo.Count);
    }
    //計算形成一種格式
    static void CalcListInfo(List<string> fileInfo)
    {
        //fileInfo Number01 ope Number02 = 
        for (int i = 0; i < fileInfo.Count; i++)       
            fileInfo[i] = CalcStringArray(fileInfo[i].Split(' '));
    }
    // 將計算之後的內容挨個放入一個新的文字
    static void WriteListInfoToFile(string oldPath, List<string> fileInfo)
    {
        string tmpPath = oldPath.Insert(oldPath.IndexOf('.'), "_copy");
        using (StreamWriter writer = new StreamWriter(tmpPath,false,Encoding.UTF8))
        {
            for (int i = 0; i <fileInfo.Count ; i++)
            {
                writer.WriteLine(fileInfo[i]);
            }
        }
    }
    static void Main(string[] args)
    {
        //定義儲存空間
        List<string> infoList = new List<string>();
        //輸入路徑
        string path = Console.ReadLine();
        //讀檔案
        ReadFileToList(path,infoList);
        //計算
        CalcListInfo(infoList);
        //寫文字
        WriteListInfoToFile(path,infoList);

    }
}

}