Can't use tween.Finished in C#

[rodynos]

Godot Version

4.2

Question

I am following a tutorial on how to make lasers in godot and the tutorial is in GDScript. But I am trying to convert the code to C#.

public async void Activate(float time)
{
tween = GetTree().CreateTween();
Visible = true;
beamParticles.Emitting = true;
endParticles.Emitting = true;
tween.SetParallel(true);
tween.TweenProperty(mesh, “TopRadius”, beamRadius, time);
tween.TweenProperty(mesh, “BottomRadius”, beamRadius, time);
tween.TweenProperty(beamProcessMaterial, “ScaleMin”, 1, time);
tween.TweenProperty(endBeamProcessMaterial, “ScaleMin”, 1, time);
await tween.Finished;
}

With this piece of code I get an error called this:
The event ‘Tween.Finished’ can only appear on the left hand side of += or -= CS0079

I have made research on how to solve this and I looked at the godot and C# documentation for help but it was all in vain. Any help is appreciated. Thank you in advance.

[athousandships]

See the documentation

[rodynos]

Thank you for your reply. I did not know I had to look at await. I get no errors in the code but now when I run the game I get an error called “started with no tweeners” in the engine. Would you know anything about that?

[rodynos]

What do you mean by example?

[rodynos]

Apologies for not understanding what you mean. Here it is:

Godot 4: 3D Laser Tutorial

[rodynos]

I had already done what you said with the help of the documentation that athousandships gave me. I was getting an error in the code editor before doing that. Now I get an error in the game engine called : started with no tweeners. I learned that someone solved this by creating the tween where it is used but I already do that so I got no idea how to solve this one.