c#文件拷贝

执行拷贝的代码如下:

private void button1_Click(object sender, EventArgs e)

        {

                      FileStream f = new FileStream(this.textBox1 .Text ,FileMode.Open );

                       byte []b=new byte [f.Length ];

                        fs.Read(br ,0,b .Length );

                       fs.Close();

 

                        FileStream f1 = new FileStream(this.textBox2 .Text ,FileMode.Create );

                      f1.Write(b ,0,b .Length );

                      fs1.Close();

        }