Directory.Build.props

<Project>
    <PropertyGroup>
        <VersionPrefix>4.0.0</VersionPrefix>
        <Authors>Ionx Solutions</Authors>
        <Copyright>Copyright © Ionx Solutions 2018</Copyright>
    
        <!-- Set an explicit language version, which should be one that is supported by the official build system.
        This is considered a best practice that can help prevent hard to diagnose runtime errors if someone with a
        newer language support uses a new language feature, but that language feature isn't supported by the underlying
        target framework version. Since our target framework is .NET Standard 2.0, it supports up to C# language version
        7.3. See the following:
        https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/configure-language-version
        However, we have been using newer language version features without any problems. So we will set the version
        to match those features that we are using. -->
        <LangVersion>9.0</LangVersion>
    </PropertyGroup>
</Project>