Unnecessary parenthesis check is incompatible with is operator

[abatishchev]

Having the following expression:

var obj = new GetSome();
if (!(obj is null))
{
}

I'm getting a suggestion:

Statement must not use unnecessary parenthesis.

Removing the parenthesis:

var obj = new GetSome();
if (!obj is null)
{
}

leads to a compiler error:

Error CS0023 Operator '!' cannot be applied to operand of type 'Foo'

The version I'm using:

<PackageReference Include="StyleCop.Analyzers" Version="1.0.2" PrivateAssets="All" />

[vweijsters]

The obj is null is a C# 7 language construct. StyleCop.Analyzers 1.0.2 does not support c# 7, 1.1.0-beta releases are meant for that.