Copying A Database

Hello,I'm trying to make a copy of a database with this code





Code Snippet

private void button1_Click(object sender, EventArgs e)
{
string dbname = @"D:Documents and SettingsBeheerderMijn documentenVisual Studio 2005ProjectsTest12Test12inDebugDatabase1.mdf";
string constr = string.Format("Data Source=(local)\SQLEXPRESS;AttachDBFilename="{0}";Integrated Security=True;Connect Timeout=30;User Instance=True", dbname);
using (SqlConnection connection = new SqlConnection(constr))
{
connection.Open();
connection.Close();
}
File.Copy("Database1.mdf", "Database1Copy.mdf");
}
but once the code tries to execute the File.Copy line it comes with an error that the database is currently in use by another program, and also when I'm debugging the program and I try to copy this database with windows explorer it says that the program is currently in use.I've read up some stuff and found that you can stop the SQLServer Service, wich I did but then my program gave an error about not being able to connect to the database, when starting upand also detaching and attaching a database, wich I don't know how to do.So my question is are any of these above methods correct to do, and how do write the code for it? If not is there any other way to copy a database?Thanks in advance,Ruben Pieters