public async Task <Stream> ReadFileContentsAsync(SystemFilepath systemPath)
{
var(dirname, basename) = systemPath.Split();
var directory = directoryFactory.Open(dirname);
return(await directory.ReadFileAsync(basename));
}
public async Task WriteFileContentsAsync(SystemFilepath systemPath, Stream contents)
{
var(dirname, basename) = systemPath.Split();
var directory = directoryFactory.Open(dirname);
await directory.WriteFileAsync(basename, contents);
}