public override long Seek(long offset, SeekOrigin origin)
{
switch (origin)
{
case SeekOrigin.Begin:
file.Seek(offset);
break;
case SeekOrigin.Current:
file.Seek(file.GetPosition() + offset);
break;
case SeekOrigin.End:
file.SeekEnd(offset);
break;
default:
throw new ArgumentOutOfRangeException(nameof(origin), origin, null);
}
return file.GetPosition();
}
