C#方法-去除代码前序号

        // 去掉复制代码前面的序号
        static public string GetCode(string path = null)
        {
            if(path == null)
                path = @"E:/code.txt";
            string[] allCodeLine = System.IO.File.ReadAllLines(path, System.Text.Encoding.Unicode);

            System.Text.StringBuilder strb = new System.Text.StringBuilder();
            Enumerable.Range(0, allCodeLine.Count()).ToList().ForEach(x =>
            {
                string output = 
                    System.Text.RegularExpressions.Regex.Replace(allCodeLine[x].ToString().Trim(), "^(\\d*)", "");
                strb.AppendLine(output);
            });
            
            StreamWriter sw = new StreamWriter(path);
            sw.Write(strb.ToString());
            return strb.ToString();
        }