protected void CopyFile(String PathFileName)
{
using (var SourceStream = SourceFileSystem.OpenFile(FileSystem.CombinePath(DestinationPath, PathFileName), FileMode.Open))
using (var DestinationStream = DestinationFileSystem.OpenFile(FileSystem.CombinePath(DestinationPath, PathFileName), FileMode.Create))
{
SourceStream.CopyToFast(DestinationStream);
}
}