如下图，读取每行文本，每行文本再按空格分开读取一个字符串，输出到另一个文本：

 

CAD环境下，代码如下：

using Autodesk.AutoCAD.DatabaseServices;
using Autodesk.AutoCAD.Runtime;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using AcTools;
using Autodesk.AutoCAD.Geometry;
using System.IO;namespace Acdemo
{public class Acdemo{[CommandMethod("xx")]public void Demo(){string filename = @"E:\vba\888.txt";string filename1 = @"E:\vba\999.txt";try{File.Delete(filename1); string[] contents = File.ReadAllLines(filename);List<List<string>> list = new List<List<string>>();for (int i = 0; i < contents.Length; i++){string[] cont = contents[i].Split(new char[] { ' ' });List<string> sublist = new List<string>();for (int j = 0; j < cont.Length; j++){sublist.Add(cont[j]);File.AppendAllLines(filename1, cont);}list.Add(sublist);}}catch (System.Exception){throw;}}  }
}