I installed .NET 6. Using Visual Studio 2019. Checked .net version by typing dotnet --info. Everything is okay. However, when I create a new project in VS, I don't see .NET 6 in a dropdown menu. It's .NET 5 by default. Nevertheless, changed the version in .csproj file. The content of the file is:
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>net6.0</TargetFramework>
<LangVersion>preview</LangVersion>
<EnablePreviewFeatures>true</EnablePreviewFeatures>
</PropertyGroup>
The problem is I can't use any new C# 10 features. Can't even change C# version in Advanced properties: example