I render a 3D data by setting device.RenderState.AlphaBlendEnable = true
it gives a side view like below:


Now my top view looks like this, the outer surface layer covered the underneath layers and resulting only outer layer is displayed at top view.

I would like to view the underneath layer from top view. How do I do this? Is there any setting can be done in Microsoft.DirectX ?
Update: Question is solved by myself
device.RenderState.ZBufferWriteEnable = false;