Memory2DPool

[benberlin7]

I try to create a Memorypool for a Memory2d buffer.

var owner = System.Buffers.MemoryPool<Memory2D<double>>.Shared.Rent();
var mem2D = owner.Memory;
var Arr2D = new double[2,2];
mem2D = Arr2D.AsMemory2D(0, 0, 2, 2);

Gives me this exception in line 4

First I thought there's sth. wrong with the reference, because it says "System.Memory" instead of "System.Buffers" but after restarting and rebuilding it still has the same error.

Am I doing sth wrong or is there no possibility for pooling 2d memory buffers?