AngleSharp by Florian Rappl

<PackageReference Include="AngleSharp" Version="0.6.1" />

.NET API 886,784 bytes

 IMutationObserver

public interface IMutationObserver
MutationObserver provides developers a way to react to changes in a DOM.
void Connect(INode target, IMutationObserverInit options)

Registers the MutationObserver instance to receive notifications of DOM mutations on the specified node.

void Disconnect()

Stops the MutationObserver instance from receiving notifications of DOM mutations. Until the observe() method is used again, observer's callback will not be invoked.

Empties the MutationObserver instance's record queue and returns what was in there.