### Purpose of this PR

* Description of feature/change.
* Which part of OpenTK does this affect (Math, OpenGL, Platform, Input, etc).
* Links to screenshots, design docs, user docs, etc.

### Testing status

* Explanation of what’s tested, how tested and existing or new automation tests.
* Can include manual testing by self.
* Specify test plans.
* Rarely acceptable to have no testing.

### Comments

* Any other comments to help understand the change.
