1. File Copy private void Form1_Load(object sender, EventArgs e) { string ori_File = @"C:\copytest\test_ori.txt"; string new_file = @"C:\copytest\test_new.txt"; System.IO.File.Copy(ori_File, new_file); } 2. File Delete private void Form1_Load(object sender, EventArgs e) { string ori_File = @"C:\copytest\test_ori.txt"; string new_file = @"C:\copytest\test_new.txt"; //System.IO.File.Copy(ori_File,..