Suggested fix for RCS1077 runs slower

Great work guys!

**Product and Version Used**: 3.2.2

Running on ASP.NET 4.8, RCS1077 triggers for this snippet:
```csharp
_items.Where(x => x.Id == findId).SingleOrDefault();
```
Suggested fix is as follows but runs 250% slower (20,000 iterations):
```csharp
_items.SingleOrDefault(x => x.Id == findId);
```