public Upload(
Guid id,
Guid previewId,
uint num,
string name,
string contentType,
StreamAdapter streamAdapter) : base(id, num, name, contentType, streamAdapter)
{
PreviewId = previewId;
}
protected FileDescriptor(Guid id, uint number, string name, string contentType, StreamAdapter streamAdapter) :
base(id, number, name, contentType)
{
Stream = streamAdapter;
}