How to use UnsafeList AddRange

I'm having difficulty understanding how to do this properly. I get an error on line 16 which reads:
"Pointers and fixed size buffers may only be used in an unsafe context [Assembly-CSharp]csharp(CS0214)"

Code (CSharp):

1. public struct Poly : IDisposable
2. {
3.     public bool isClosed;
4.     public AABB AABB;
5.     UnsafeList<float3> points;
6.  
7.     public Poly (bool closed)
8.     {
9.         isClosed = closed;
10.         AABB = new AABB();
11.         points = new UnsafeList<float3>(3, Allocator.Persistent);
12.     }
13.     // ...
14.     public void AddPoints(ref NativeList<float3> pts)
15.     {
16.         points.AddRange(pts.GetUnsafeReadOnlyPtr(), pts.Length);
17.         UpdateBounds();
18.     }
19.     // ...
20. }

Somewhat off topic, but if I have a NativeList<Poly> and Dispose it, will each Poly item have its Dispose method invoked automatically?

 

GetUnsafeReadOnlyPtr() returns a pointer

You need to use the unsafe keyword and to mark your asmdef as allowing unsafe code to use

No, you need to call them yourself.

 

For anyone else who's unfamiliar with assembly definitions.