I'm having an issue with calculating the predicted linear angle a projectile needs to move in to intersect a moving enemy ship for my 2D game.

I've tried following the document here, but what I've have come up with is simply awful.

protected Vector2 GetPredictedPosition(float angleToEnemy, ShipCompartment origin, ShipCompartment target)
{
    // Below obviously won't compile (document wants a Vector, not sure how to get that from a single float?)
    Vector2 velocity = target.Thrust - 25f; // Closing velocity (25 is example projectile velocity)
    Vector2 distance = target.Position - origin.Position; // Range to close
    double time = distance.Length() / velocity.Length(); // Time

    // Garbage code, doesn't compile, this method is incorrect
    return target.Position + (target.Thrust * time);
}

I would be grateful if the community can help point out how this is done correctly.