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private void BeginBtn_click(object sender, System.EventArgs e)

{

string URL=textBox1.Text;

if(radioButton1.Checked==false&&radioButton2.Checked==false)

MessageBox.Show("Please choose the mode!");

else

{

if(radioButton1.Checked==true)

{

try

{

statusBar1.Text="Begin to download";

MyWebClient.DownloadFile(URL,textBox2.Text);

statusBar1.Text="Download Successfully!";

}

catch(WebException ee)

{MessageBox.Show(ee.Message);}

}

if(radioButton2.Checked==true)

{

try

{

statusBar1.Text="Begin to upload";

MyWebClient.UploadFile(URL,textBox2.Text);

statusBar1.Text="Upload Successfully!";

}

catch(WebException ee)

{MessageBox.Show(ee.Message);}

}

}

}