Bitmap for UWP
Create メソッド (Layer)

C1.UWP.DX アセンブリ > C1.Util.DX.Direct2D 名前空間 > Layer クラス : Create メソッド
Creates a layer resource that can be used with this render target and its compatible render targets. The new layer has the specified initial size. The layer resource is allocated to the minimum size when {{PushLayer}} is called.
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オーバーロード解説
Creates a layer resource that can be used with this render target and its compatible render targets. The new layer has the specified initial size. The layer resource is allocated to the minimum size when {{PushLayer}} is called.  
Creates a layer resource that can be used with this render target and its compatible render targets. The new layer has the specified initial size.  
参照

Layer クラス
Layer メンバ