Use latest C# language features.

bgrainger · bgrainger · commit e79e8193a645 · 2018-03-04T15:04:33.000-08:00
diff --git a/tests/Benchmark/Benchmark.csproj b/tests/Benchmark/Benchmark.csproj
@@ -2,6 +2,7 @@
   <PropertyGroup>
     <OutputType>Exe</OutputType>
     <TargetFrameworks>netcoreapp1.1;net47;netcoreapp2.0</TargetFrameworks>
+    <LangVersion>latest</LangVersion>
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="BenchmarkDotNet" Version="0.10.13" />
