Topic: Playing with C#8 in Framework 4.8

[kdub_nz]

FWIW :
C# 11 is as far as I've gone.

No Blow-Ups yet . . . but my testing has been pretty simple, so far.
Perhaps take care not to use on production code !!

Using Microsoft Visual Studio Community 2022 (64-bit) - Preview
Version 17.8.0 Preview 1.0

My current .csproj file
The references to NUnit will be removed tonight

Code - XML: [Select]

1. <Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
2.   <Import Project="..\packages\NUnit.3.13.3\build\NUnit.props" Condition="Exists('..\packages\NUnit.3.13.3\build\NUnit.props')" />
3.   <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
4.   <PropertyGroup>
5.     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
6.     <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
7.     <ProjectGuid>{BCA3F716-BC8B-4DB0-B38E-6DB783DD0576}</ProjectGuid>
8.     <OutputType>Library</OutputType>
9.     <AppDesignerFolder>Properties</AppDesignerFolder>
10.     <RootNamespace>TestStuff_230711</RootNamespace>
11.     <AssemblyName>TestStuff_230711</AssemblyName>
12.     <TargetFrameworkVersion>v4.8.1</TargetFrameworkVersion>
13.     <FileAlignment>512</FileAlignment>
14.     <Deterministic>true</Deterministic>
15.     <TargetFrameworkProfile />
16.     <NuGetPackageImportStamp>
17.     </NuGetPackageImportStamp>
18.   </PropertyGroup>
19.   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
20.     <DebugSymbols>true</DebugSymbols>
21.     <DebugType>full</DebugType>
22.     <Optimize>false</Optimize>
23.     <DefineConstants>DEBUG;TRACE</DefineConstants>
24.     <ErrorReport>prompt</ErrorReport>
25.     <WarningLevel>4</WarningLevel>
26.     <StartAction>Program</StartAction>
27.     <StartProgram>C:\Program Files\Autodesk\AutoCAD 2023\acad.exe</StartProgram>
28.     <StartArguments>/nologo /b "start.scr"</StartArguments>
29.  
30. <!-- revised kdub -->
31.     <OutputPath>bin\x64\Debug\</OutputPath>
32.     <PlatformTarget>x64</PlatformTarget>
33.     <!-- <LangVersion>7.3</LangVersion> -->
34.     <!-- <LangVersion>8.0</LangVersion> -->
35.     <LangVersion>11.0</LangVersion>
36.     <Nullable>enable</Nullable>
37. <!-- revised kdub -->
38.  
39.     <DocumentationFile>bin\x64\Debug\TestStuff_230711.xml</DocumentationFile>
40.   </PropertyGroup>
41.   <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
42.     <DebugType>pdbonly</DebugType>
43.     <Optimize>true</Optimize>
44.     <DefineConstants>TRACE</DefineConstants>
45.     <ErrorReport>prompt</ErrorReport>
46.     <WarningLevel>4</WarningLevel>
47.  
48. <!-- revised kdub -->
49.     <OutputPath>bin\x64\Release\</OutputPath>
50.     <PlatformTarget>x64</PlatformTarget>
51.     <!-- <LangVersion>7.3</LangVersion> -->
52.     <!-- <LangVersion>8.0</LangVersion> -->
53.     <LangVersion>11.0</LangVersion>
54.     <Nullable>enable</Nullable>
55. <!-- revised kdub -->
56.  
57.   </PropertyGroup>
58.   <ItemGroup>
59.     <Reference Include="AcCoreMgd">
60.       <HintPath>..\..\..\..\..\Work\ObjectARX_2023\inc\AcCoreMgd.dll</HintPath>
61.       <Private>False</Private>
62.     </Reference>
63.     <Reference Include="AcDbMgd">
64.       <HintPath>..\..\..\..\..\Work\ObjectARX_2023\inc\AcDbMgd.dll</HintPath>
65.       <Private>False</Private>
66.     </Reference>
67.     <Reference Include="acdbmgdbrep">
68.       <HintPath>..\..\..\..\..\Work\ObjectARX_2023\inc\acdbmgdbrep.dll</HintPath>
69.       <Private>False</Private>
70.     </Reference>
71.     <Reference Include="AcMgd">
72.       <HintPath>..\..\..\..\..\Work\ObjectARX_2023\inc\AcMgd.dll</HintPath>
73.       <Private>False</Private>
74.     </Reference>
75.     <Reference Include="nunit.framework, Version=3.13.3.0, Culture=neutral, PublicKeyToken=2638cd05610744eb, processorArchitecture=MSIL">
76.       <HintPath>..\packages\NUnit.3.13.3\lib\net45\nunit.framework.dll</HintPath>
77.     </Reference>
78.     <Reference Include="System" />
79.     <Reference Include="System.Core" />
80.     <Reference Include="System.Xml.Linq" />
81.     <Reference Include="System.Data.DataSetExtensions" />
82.     <Reference Include="Microsoft.CSharp" />
83.     <Reference Include="System.Data" />
84.     <Reference Include="System.Net.Http" />
85.     <Reference Include="System.Xml" />
86.   </ItemGroup>
87.   <ItemGroup>
88.     <Compile Include="Initialization.cs" />
89.     <Compile Include="PathNetCore.cs" />
90.     <Compile Include="Test_cs08_11.cs" />
91.     <Compile Include="Properties\AssemblyInfo.cs" />
92.   </ItemGroup>
93.   <ItemGroup>
94.     <None Include="packages.config" />
95.     <None Include="start.scr">
96.       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
97.     </None>
98.   </ItemGroup>
99.   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
100.   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
101.     <PropertyGroup>
102.       <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
103.     </PropertyGroup>
104.     <Error Condition="!Exists('..\packages\NUnit.3.13.3\build\NUnit.props')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\NUnit.3.13.3\build\NUnit.props'))" />
105.   </Target>
106. </Project>
107.  
108.  

[kdub_nz]

Testing concepts in LinqPad for language changes.

Beginning with C# 11, the interpolated expressions can include newlines.
The text between the { and } must be valid C#, therefore it can include newlines that improve readability.

example of a switch statement in an Interpolated string . . eminently readable !

Of course, the return value of the switch statement could be passed to a layer-changing statement.