Hi srigates,
here i have a solution for your error.
and copy to file to destination where u want
string filepath = System.IO.Directory.GetCurrentDirectory();
Directory.CreateDirectory(textBox2.Text);
File.Copy(filepath+@"\setup.exe", "destination file path" + @"\setup.exe ");
System.Diagnostics.Process.Start(textBox2.Text + @"\setup.exe");
I hope it will help for you.... just have a fun.