File static class

File static class can be easily used for this purpose.

File.Copy(@"sourcePath\\abc.txt", @"destinationPath\\abc.txt");
File.Copy(@"sourcePath\\abc.txt", @"destinationPath\\xyz.txt");

Remark: By this method, file is copied, meaning that it will be read from the source and then written to the destination path. This is a resource consuming process, it would take relative time to the file size, and can cause your program to freeze if you don’t utilize threads.