PSD file format - read linked layer

Hello all.

I want to read .psd file on my program.

I am using C#, in fact I am a Unity3D programmer and I want to read all layer information on my Unity Editor tool.

My program can read all layers in .psd file, and it is works perfectly.

But it can not read LINKED layers.

How can I get the information of linked layers?

I referenced on http://www.adobe.com/devnet-apps/photoshop/fileformatashtml/#50577409_75067

But in my PSD file, I can not see the tag lnkD or lnk2, lnk3.

My PSD has linked layers.

Please help me.

Thank you.