ISG fails if encounter `Dictionary<,>.TryGetValue(..., out _);`

[lsoft]

ISG gets shocked because of the following sentence: out _, replacing this with out var unused makes things works fine. :)

test:

    public partial class Subject
    {
        [CreateSyncVersion]
        public async Task<object> SomeMethodAsync(object o)
        {
            var d1 = new Dictionary<int, int>();
            d1.TryGetValue(0, out _);

            await Task.Delay(1);

            return null;
        }
    }

[virzak]

I didn't even know you can do out _. Always used out var _.