Issues switching from .NET SDK 6.0.x to 7.0.100

As a first step in migrating a .NET desktop (WPF,WinForms) application from .NET 6.0 to .NET 7.0 we have been simply switching to the new .NET SDK 7.0.100 by e.g. defining:

{
  "sdk": {
    "version": "7.0.100",
    "rollForward": "latestFeature",
    "allowPrerelease": false
  }
}

where version before was say 6.0.403. No other changes were made. However, this caused two sets of issues and we are wondering if these were expected, why and how to handle them properly. The two issues are:

• Change in behavior when defining <PublishSingleFile>true</PublishSingleFile> in csproj
• Change in code analysis rules causing errors

PublishSingleFile

This was a head scratcher. The solution in question will build an AnyCPU exe that works and runs on both x86 and x64. However, when switching to .NET SDK 7.0.100 this would not work. Either tests would simply not run with issues around bad format for the exe assembly or similar. Or if trying to run the exe project e.g. using F5 in visual studio this would simply crash upon start before anything with something like The target process exited without raising a CoreCLR started event. Ensure that the target process is configured to use .NET Core."... code 2147516546 (0x80008082). As far as I can tell it turns out behavior has changed (silently) for PublishSingleFile so this now forces a RuntimeIdentifier (RID) to be set without any warning or similar. This causes the “format” of the output assembly to become platform specific e.g. win-x64 and hence trying to run x86 tests based on it will fail. Changing this definition to:

    <PublishSingleFile Condition="'$(RuntimeIdentifier)' != ''">true</PublishSingleFile>

resolved the issue. Guessing you should simply not define these options in csproj in the future if you have project that you want to build as Any CPU but instead do that only on command line when actually doing publish. Which means these often become redundantly defined.

Code Analysis Changes

This we don’t understand. We have the following defined in Directory.Build.props with an accompanying .editorconfig next to sln at root of git repo.

    <AnalysisLevel>latest</AnalysisLevel>
    <EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>
    <RunAnalyzersDuringBuild>true</RunAnalyzersDuringBuild>
    <EnableNETAnalyzers>true</EnableNETAnalyzers>
    <CodeAnalysisTreatWarningsAsErrors>true</CodeAnalysisTreatWarningsAsErrors>

This compiled fine with zero errors using .NET 6.0 SDK. Switching to .NET SDK 7.0.100 and we had to define the following NoWarn to the solution building without errors. Note that the set of CAxxxx errors reported in VS and on command line are different this is the union of both to get both building.

    <NoWarn>
      $(NoWarn);
      CA1000;CA1001;CA1002;CA1003;CA1005;CA1008;CA1010;CA1012;CA1017;
      CA1021;CA1024;CA1028;CA1030;CA1031;CA1032;CA1036;
      CA1040;CA1043;CA1044;CA1045;CA1051;CA1052;CA1060;CA1062;CA1063;CA1065;CA1067;
      CA1304;CA1305;CA1307;CA1309;CA1310;CA1311;
      CA1401;CA1501;CA1506;CA1508;
      CA1707;CA1710;CA1711;CA1716;CA1720;CA1721;CA1724;CA1725;
      CA1802;CA1805;CA1810;CA1813;CA1814;CA1815;CA1816;CA1819;
      CA1820;CA1823;CA1825;CA1826;CA1829;CA1838;CA1850;CA1851;CA1852;
      CA2000;CA2007;CA2008;CA2101;CA2201;CA2208;CA2213;CA2214;CA2217;CA2225;CA2227;
      CA5392;CA5394
    </NoWarn>

that’s a lot of new code analysis rules suddenly causing errors and this seems off, is this expected?

We would also the have expected to be able to set AnalysisLevel to 6.0 and get the 6.0 SDK behavior but this had no effect at all. Was this not the intended function of this property?

    <AnalysisLevel>6.0</AnalysisLevel>

Further technical details

• Include the output of dotnet --info

 dotnet --info
.NET SDK:
 Version:   7.0.100
 Commit:    e12b7af219

Runtime Environment:
 OS Name:     Windows
 OS Version:  10.0.19044
 OS Platform: Windows
 RID:         win10-x64
 Base Path:   C:\Program Files\dotnet\sdk\7.0.100\

Host:
  Version:      7.0.0
  Architecture: x64
  Commit:       d099f075e4

.NET SDKs installed:
  3.1.425 [C:\Program Files\dotnet\sdk]
  5.0.100 [C:\Program Files\dotnet\sdk]
  5.0.408 [C:\Program Files\dotnet\sdk]
  5.0.413 [C:\Program Files\dotnet\sdk]
  6.0.100-rc.2.21505.57 [C:\Program Files\dotnet\sdk]
  6.0.111 [C:\Program Files\dotnet\sdk]
  6.0.203 [C:\Program Files\dotnet\sdk]
  6.0.306 [C:\Program Files\dotnet\sdk]
  6.0.400 [C:\Program Files\dotnet\sdk]
  6.0.403 [C:\Program Files\dotnet\sdk]
  7.0.100-rc.1.22431.12 [C:\Program Files\dotnet\sdk]
  7.0.100 [C:\Program Files\dotnet\sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.All 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.18 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.26 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.30 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.31 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.8 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.9 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.10 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.0-rc.2.21480.10 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.1 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.10 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 6.0.11 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 7.0.0-rc.1.22427.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 7.0.0 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 2.1.30 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.18 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.26 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.30 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.31 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.9 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.10 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.0-rc.2.21480.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.1 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.10 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 6.0.11 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 7.0.0-rc.1.22426.10 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.NETCore.App 7.0.0 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
  Microsoft.WindowsDesktop.App 3.1.18 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 3.1.26 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 3.1.30 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 3.1.31 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 5.0.0 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 5.0.9 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 5.0.10 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 5.0.17 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.0-rc.2.21501.6 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.1 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.5 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.10 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 6.0.11 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 7.0.0-rc.1.22427.1 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
  Microsoft.WindowsDesktop.App 7.0.0 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

Other architectures found:
  arm64 [C:\Program Files\dotnet]
    registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\arm64\InstallLocation]
  x86   [C:\Program Files (x86)\dotnet]
    registered at [HKLM\SOFTWARE\dotnet\Setup\InstalledVersions\x86\InstallLocation]

Environment variables:
  Not set

• The IDE (VS / VS Code/ VS4Mac) you’re running on, and its version

Visual Studio 17.5.0 Preview 1.0

[Youssef1313]

@martincostello This is fixed in https://github.com/dotnet/roslyn-analyzers/pull/6278

[nietras]

A little side note also discovered a rule CA1852 that is “undocumented” below link will fail can can’t google it:

https://learn.microsoft.com/en-us/dotnet/fundamentals/code-analysis/quality-rules/ca1852

Severity	Code	Description	Project	File	Line	Suppression State
Error	CA1852	Type 'XYZ' can be sealed because it has no subtypes in its containing assembly and is not externally visible WWW

and I hit the top-level statement issue here too:

https://github.com/dotnet/runtime/issues/78270 “Type ‘Program’ can be sealed because it has no subtypes in its containing assembly and is not externally visible”