Wait for parent node to be Ready in C#

How can I achieve this in C#. I need to wait until the parent node has finished his initialization.

yield(owner, "ready")

Instead of yielding, connect the ready signal from parent to child

This can be achieved with:

await ToSignal(GetParent(), "ready");

Thanks will try it that way.

Do you know is it generally possible to "await" things with C# in Godot? So using Task, IEnumarators and async operations?

Yes, you can use Node.ToSignal(), like this:

await ToSignal(GetTree(), "idle_frame");