public void StructWithMarshallingArrays() { int seed = 37; var rng = new Random(seed); StructWithMarshal[] array = new StructWithMarshal[5]; for (int i = 0; i < array.Length; i++) { for (int j = 0; j < array[i].I.Length; j++) { array[i].I[j] = rng.Next(); } } int result = NativeFunctions.SumStructWithMarshal(array); Assert.Equal(array.SelectMany(x => x.I).Aggregate((x, a) => x + a), result); }