C# 如何创建txt文件！谢谢

Answer 1

// 判断文件是否存在，不存在则创建，否则读取值显示到窗体if (!File.Exists("F:\\TestTxt.txt")){FileStream fs1 = new FileStream("F:\\TestTxt.txt", FileMode.Create, FileAccess.Write);//创建写入文件StreamWriter sw = new StreamWriter(fs1);sw.WriteLine(this.textBox3.Text.Trim() + "+" + this.textBox4.Text);//开始写入值sw.Close();fs1.Close();}else{FileStream fs = new FileStream("F:\\TestTxt.txt", FileMode.Open, FileAccess.Write);StreamWriter sr = new StreamWriter(fs);sr.WriteLine(this.textBox3.Text.Trim() + "+" + this.textBox4.Text);//开始写入值sr.Close();fs.Close();}