public Task RestoreAsync(string backupFolderPath)
{
string stateBin = Path.Combine(backupFolderPath, "state.bin");
if (!File.Exists(stateBin))
{
throw new InvalidOperationException("No backed up state exists.");
}
using (var fs = File.OpenRead(stateBin))
{
_store.Deserialize(fs);
}
return(Task.FromResult(true));
}