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I have solution with couple .NET Standard projects in all I wanted to enable c# 8 and nullable like below:
<PropertyGroup>
<TargetFramework>netstandard2.1</TargetFramework>
<LangVersion>8.0</LangVersion>
<Nullable>enable</Nullable>
</PropertyGroup>
Note: These settings are found in your .csproj file.
The problem is that some projects are compiling fine and some have error:
Invalid 'nullable' value: 'Enable' for C# 7.3. Please use language version 'preview' or greater
I have Visual Studio 16.2 Preview 2 and .NET Core 3 Preview 6. Is this a bug in preview or I'm doing something wrong?
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C programming language is a machine-independent programming language that is mainly used to create many types of applications and operating systems such as Windows, and other complicated programs such as the Oracle database, Git, Python interpreter, and games and is considered a programming foundation in the process of ...
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You should try <LangVersion>preview</LangVersion> as the error message suggests.
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