Passing multidimensional C# array to np.array results in a flat numpy array

```csharp
var shape = np.array(new float[,] { { 0, 0 }, { 0, 1 }, { 1, 0 }, { 1, 1 } }).shape;
```
### Expected
(4,2)

### Actual
8

### Workaround
Use jagged array or `reshape`.