[brewmarche]

You have to write a disposable wrapper to return. Return it in error case too.

    readonly record struct Result<TResult, TDisposable>(TResult? IfHappy, TDisposable? Disposable): IDisposable where TDisposable : IDisposable
    {
        public void Dispose() => Disposable?.Dispose();
    }

[brewmarche]

Usage at call site:

    using (var result = foo.GetSomethingIfLucky())
    {
        if (result.IfHappy is {} success)
        {
            // do something
        }
    }