Copying files in C# with specific extension and timestamp

string[] files = Directory.GetFiles(Server.MapPath("~/Folder1/"), "*.doc");
foreach(string file in files)
{
    File.Copy(file, Server.MapPath("~/Folder2/") + Path.GetFileName(file));
}
 
files = Directory.GetFiles(Server.MapPath("~/Folder1/"), "*.docx");
foreach (string file in files)
{
    File.Copy(file, Server.MapPath("~/Folder2/") + Path.GetFileName(file));
}