Error after "prefer IsEmpty over Count" refactoring when original code uses pattern matching syntax

_This issue has been moved from [a ticket on Developer Community](https://developercommunity.visualstudio.com/t/Error-after-prefer-IsEmpty-over-Count-/11017155)._

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\[severity:It bothers me. A fix would be nice\]
Hi,

in the current version of VS 2026 18.1.0 there seems to be a little bug when trying to apply the “prefer IsEmpty over Count” refactoring on a ConcurrentDictionary. It seems that this is only an issue if the original code uses pattern matching syntax

```
if (test. Count is > 0) // ... but the refactoring works as expected for: if (test. Count > 0)

```

same for

```
if (test. Count is 0)
{
test. TryAdd("d", 2);
}

```

after refactoring its:

```
if (IsEmpty)
{
test. TryAdd("d", 2);
}

```

Please see the attached gif video.
[Incorrect\_IsEmpty\_Refactorying.gif](https://aka.ms/dc/file?name=Be7918b4bd4264bb8b0cf8c02c9afaaf0639014720258158916_Incorrect_IsEmpty_Refactorying.gif&tid=e7918b4bd4264bb8b0cf8c02c9afaaf0639014720258158916)

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### Original Comments

#### Feedback Bot on 12/17/2025, 08:50 AM:

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