Update to supported dotnet

.editorconfig

@@ -130,7 +130,7 @@ dotnet_diagnostic.RCS1124.severity = none
 dotnet_diagnostic.RCS1077.severity = none
 
 # IDE0040: Add accessibility modifiers
-dotnet_style_require_accessibility_modifiers = always:warning
+dotnet_style_require_accessibility_modifiers = for_non_interface_members:warning
 
 # IDE0048: Add parentheses for clarity
 dotnet_style_parentheses_in_relational_binary_operators = always_for_clarity:none

.github/upgrades/dotnet-upgrade-plan.md

@@ -0,0 +1,34 @@
+# .NET 10 Upgrade Plan
+
+## Execution Steps
+
+Execute steps below sequentially one by one in the order they are listed.
+
+1. Validate that a .NET 10.0 SDK required for this upgrade is installed on the machine and if not, help to get it installed.
+2. Ensure that the SDK version specified in global.json files is compatible with the .NET 10.0 upgrade.
+3. Upgrade CSharpNetStandardLib/CSharpNetStandardLib.csproj
+4. Upgrade ConsoleApp2/CSharpConsoleApp.csproj
+5. Upgrade ConsoleApp1/VisualBasicConsoleApp.vbproj
+
+## Settings
+
+### Project upgrade details
+
+#### CSharpNetStandardLib/CSharpNetStandardLib.csproj modifications
+
+Project properties changes:
+  - Target framework should be changed from `netstandard2.0` to `net10.0`
+
+#### ConsoleApp2/CSharpConsoleApp.csproj modifications
+
+Project file needs to be converted to SDK-style format.
+
+Project properties changes:
+  - Target framework should be changed from `.NETFramework,Version=v4.8` to `net10.0`
+
+#### ConsoleApp1/VisualBasicConsoleApp.vbproj modifications
+
+Project file needs to be converted to SDK-style format.
+
+Project properties changes:
+  - Target framework should be changed from `.NETFramework,Version=v4.8` to `net10.0`

.github/workflows/dotnet.yml

@@ -7,7 +7,7 @@ on:
     branches: [ master ]
 
 env:
-  BuildVersion: '9.2.7'
+  BuildVersion: '10.0.0'
 
 jobs:
  build:
@@ -30,7 +30,7 @@ jobs:
     - name: Setup .NET for main build
       uses: actions/setup-dotnet@v4
       with:
-        dotnet-version: 6.0.x
+        dotnet-version: 10.0.x
 
     - name: Add msbuild to PATH
       uses: microsoft/setup-msbuild@v2

.vscode/launch.json

@@ -0,0 +1,35 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+        {
+            // Use IntelliSense to find out which attributes exist for C# debugging
+            // Use hover for the description of the existing attributes
+            // For further information visit https://github.com/dotnet/vscode-csharp/blob/main/debugger-launchjson.md.
+            "name": ".NET Core Launch (web)",
+            "type": "coreclr",
+            "request": "launch",
+            "preLaunchTask": "build",
+            // If you have changed target frameworks, make sure to update the program path.
+            "program": "${workspaceFolder}/Web/bin/Debug/ICSharpCode.CodeConverter.Web.dll",
+            "args": [],
+            "cwd": "${workspaceFolder}/Web",
+            "stopAtEntry": false,
+            // Enable launching a web browser when ASP.NET Core starts. For more information: https://aka.ms/VSCode-CS-LaunchJson-WebBrowser
+            "serverReadyAction": {
+                "action": "openExternally",
+                "pattern": "\\bNow listening on:\\s+(https?://\\S+)"
+            },
+            "env": {
+                "ASPNETCORE_ENVIRONMENT": "Development"
+            },
+            "sourceFileMap": {
+                "/Views": "${workspaceFolder}/Views"
+            }
+        },
+        {
+            "name": ".NET Core Attach",
+            "type": "coreclr",
+            "request": "attach"
+        }
+    ]
+}

.vscode/settings.json

@@ -0,0 +1,5 @@
+{
+    "dotnet.preferCSharpExtension": true,
+    "dotnet.defaultSolution": "CodeConverter.sln",
+    "vscode-as-git-mergetool.settingsAssistantOnStartup": false
+}

.vscode/tasks.json

@@ -0,0 +1,41 @@
+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "build",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "build",
+                "${workspaceFolder}/CodeConverter.sln",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary;ForceNoAlign"
+            ],
+            "problemMatcher": "$msCompile"
+        },
+        {
+            "label": "publish",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "publish",
+                "${workspaceFolder}/CodeConverter.sln",
+                "/property:GenerateFullPaths=true",
+                "/consoleloggerparameters:NoSummary;ForceNoAlign"
+            ],
+            "problemMatcher": "$msCompile"
+        },
+        {
+            "label": "watch",
+            "command": "dotnet",
+            "type": "process",
+            "args": [
+                "watch",
+                "run",
+                "--project",
+                "${workspaceFolder}/CodeConverter.sln"
+            ],
+            "problemMatcher": "$msCompile"
+        }
+    ]
+}

CHANGELOG.md

@@ -8,6 +8,21 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 ### Vsix
 
 
+### VB -> C#
+
+
+### C# -> VB
+
+
+## [10.0.0] - 2026-02-06
+
+* Support for net framework dropped. Please use an older version if you are converting projects that still use it.
+* dotnet 10 required to run codeconv command line tool
+* Improvements to codeconv tool to support converting newer dotnet versions
+
+### Vsix
+
+
 ### VB -> C#
 
 * Xor operator overloads now converted [#1182](htts://github.com/icsharpcode/CodeConverter/issues/1182)
@@ -17,6 +32,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
 ## [9.2.7] - 2025-02-15
 
+This is the last version that supports net framework.
 
 ### Vsix
 

CommandLine/CodeConv/CodeConv.csproj → CodeConv/CodeConv.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>Exe</OutputType>
-    <TargetFramework>net8.0</TargetFramework>
+    <TargetFramework>net10.0</TargetFramework>
     <AppendTargetFrameworkToOutputPath>true</AppendTargetFrameworkToOutputPath>
     <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
     <IsPackable>true</IsPackable>
@@ -11,7 +11,7 @@
     <RootNamespace>ICSharpCode.CodeConverter.CodeConv</RootNamespace>
     <ToolCommandName>codeconv</ToolCommandName>
     <Description>Bidirectional code converter for VB and C#</Description>
-	<PackageReadmeFile>PackageReadme.md</PackageReadmeFile>
+	  <PackageReadmeFile>PackageReadme.md</PackageReadmeFile>
     <PackageProjectUrl>https://github.com/icsharpcode/CodeConverter/</PackageProjectUrl>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <PackageIcon>CodeConvNuGetPackageIcon.png</PackageIcon>
@@ -27,34 +27,22 @@
 
   <ItemGroup>
     <None Include="CodeConvNuGetPackageIcon.png" Pack="true" PackagePath="" />
-    <None Include="$(SolutionDir)CommandLine\CodeConv.NetFramework\bin\$(Configuration)\**" LinkBase="..\NetFramework" PackagePath="tools\NetFramework" Pack="true" />
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="7.0.0" />
-    <PackageReference Include="Microsoft.Build.Locator" Version="1.4.1" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.1.0" />
-    <PackageReference Include="Microsoft.CodeAnalysis.VisualBasic.Workspaces" Version="4.1.0" />
-    <PackageReference Include="Microsoft.CodeAnalysis.Workspaces.MSBuild" Version="4.1.0" />
+    <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="10.0.2" />
+    <PackageReference Include="Microsoft.Build.Tasks.Core" Version="17.8.43" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.14.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.VisualBasic.Workspaces" Version="4.14.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.Workspaces.MSBuild" Version="4.14.0" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.VisualStudio.Threading" Version="16.10.56" />
-    <PackageReference Include="Microsoft.Win32.Registry" Version="5.0.0" />
-    <PackageReference Include="NuGet.Build.Tasks" Version="6.11.0" />
-    <PackageReference Include="System.Data.SqlClient" Version="4.8.6" />
-    <PackageReference Include="System.Formats.Asn1" Version="8.0.1" />
-    <PackageReference Include="System.Memory" Version="4.5.5" />
-    <PackageReference Include="System.Net.Http" Version="4.3.4" />
-    <PackageReference Include="System.Text.RegularExpressions" Version="4.3.1" />
-
     <PackageReference Include="McMaster.Extensions.CommandLineUtils" Version="4.0.1" />
   </ItemGroup>
 
   <ItemGroup>
-    <ProjectReference Include="..\..\CodeConverter\CodeConverter.csproj" />
+    <ProjectReference Include="..\CodeConverter\CodeConverter.csproj" />
   </ItemGroup>
-
-  <Import Project="..\CodeConv.Shared\CodeConv.Shared.projitems" Label="Shared" />
 </Project>

CommandLine/CodeConv.Shared/CodeConvProgram.cs → CodeConv/CodeConvProgram.cs

@@ -56,9 +56,6 @@ public partial class CodeConvProgram
     [Option("-f|--force", "Wipe the output directory before conversion", CommandOptionType.NoValue)]
     public bool Force { get; }
 
-    [Option(CoreOptionDefinition, "Force dot net core build if converting only .NET Core projects and seeing pre-conversion compile errors", CommandOptionType.NoValue)]
-    public bool CoreOnlyProjects { get; }
-
     [Option("-b|--best-effort", "Overrides warnings about compilation issues with input, and attempts a best effort conversion anyway", CommandOptionType.NoValue)]
     public bool BestEffort { get; }
 
@@ -74,16 +71,6 @@ public partial class CodeConvProgram
 
     private async Task<int> ExecuteAsync()
     {
-        // Ideally we'd be able to use MSBuildLocator.QueryVisualStudioInstances(DiscoveryType.VisualStudioSetup) from .NET core, but it will never be supported: https://github.com/microsoft/MSBuildLocator/issues/61
-        // Instead, if MSBuild 16.0+ is available, start a .NET framework process and let it run with that
-        if (_runningInNetCore && !CoreOnlyProjects) {
-            if (await GetLatestMsBuildExePathAsync() is { } latestMsBuildExePath) {
-                return await RunNetFrameworkExeAsync(latestMsBuildExePath);
-            } else {
-                Console.WriteLine($"Using dot net SDK MSBuild which only works for dot net core projects.");
-            }
-        }
-
         try {
             Progress<ConversionProgress> progress = new Progress<ConversionProgress>(s => Console.Out.WriteLine(s.ToString()));
             await ConvertAsync(progress, CancellationToken.None);
@@ -110,23 +97,6 @@ await Console.Error.WriteLineAsync(Environment.NewLine + ex.Message + Environmen
         return 0;
     }
 
-    private static async Task<int> RunNetFrameworkExeAsync(string latestMsBuildExePath)
-    {
-        Console.WriteLine($"Using .NET Framework MSBuild from {latestMsBuildExePath}");
-        var assemblyDirectoryPath = Path.GetDirectoryName(Environment.GetCommandLineArgs()[0]);
-        var args = Environment.GetCommandLineArgs().Skip(1).ToArray();
-        if (string.IsNullOrWhiteSpace(assemblyDirectoryPath)) throw new InvalidOperationException("Could not retrieve executing assembly directory");
-        var netFrameworkExe = Path.Combine(assemblyDirectoryPath, "..", "..", "NetFramework", "ICSharpCode.CodeConverter.CodeConv.NetFramework.exe");
-        if (!File.Exists(netFrameworkExe) && Path.GetDirectoryName(assemblyDirectoryPath) is { } assemblyDirectoryParentPath) {
-
-            var debugAssemblyDirectoryPath = assemblyDirectoryParentPath.Replace("CommandLine\\CodeConv\\", "CommandLine\\CodeConv.NetFramework\\");
-            var debugNetFrameworkExe = Path.Combine(debugAssemblyDirectoryPath, "ICSharpCode.CodeConverter.CodeConv.NetFramework.exe");
-            netFrameworkExe = File.Exists(debugNetFrameworkExe) ? debugNetFrameworkExe : throw new FileNotFoundException($"Cannot find net framework exe at `{netFrameworkExe}`. Using the --core-only flag to get work around this.");
-        }
-        var exitCode = await ProcessRunner.ConnectConsoleGetExitCodeAsync(netFrameworkExe, args);
-        return exitCode;
-    }
-
     private async Task ConvertAsync(IProgress<ConversionProgress> progress, CancellationToken cancellationToken)
     {
         string finalSolutionPath = Path.IsPathRooted(SolutionPath) 
@@ -150,7 +120,7 @@ private async Task ConvertAsync(IProgress<ConversionProgress> progress, Cancella
 
         var properties = ParsedProperties();
         var joinableTaskFactory = new JoinableTaskFactory(new JoinableTaskContext());
-        var msbuildWorkspaceConverter = new MSBuildWorkspaceConverter(finalSolutionPath, CoreOnlyProjects, joinableTaskFactory, BestEffort, properties);
+        var msbuildWorkspaceConverter = new MsBuildWorkspaceConverter(joinableTaskFactory, finalSolutionPath, BestEffort, properties);
 
         var converterResultsEnumerable = msbuildWorkspaceConverter.ConvertProjectsWhereAsync(ShouldIncludeProject, TargetLanguage, progress, cancellationToken);
         await ConversionResultWriter.WriteConvertedAsync(converterResultsEnumerable, finalSolutionPath, outputDirectory, Force, true, strProgress, cancellationToken);
@@ -179,21 +149,4 @@ private bool ShouldIncludeProject(Project project)
         var isIncluded = !Include.Any() || Include.Any(regex => Regex.IsMatch(projectFilePath, regex));
         return isIncluded && Exclude.All(regex => !Regex.IsMatch(projectFilePath, regex));
     }
-
-    private static async Task<string?> GetLatestMsBuildExePathAsync()
-    {
-        // The second path here is available on github action agents: https://github.com/microsoft/setup-msbuild#how-does-this-work
-        var pathsToCheck = new[] {@"%ProgramFiles(x86)%\Microsoft Visual Studio\Installer\vswhere.exe", @"%ProgramData%\chocolatey\bin"}
-            .Select(Environment.ExpandEnvironmentVariables).ToArray();
-        var vsWhereExe = pathsToCheck.FirstOrDefault(File.Exists)
-                         ?? throw new FileNotFoundException($"Could not find VSWhere in: {string.Join(", ", pathsToCheck.Select(p => $"`{p}`"))}");
-        var args = new[] { "-latest", "-prerelease", "-products", "*", "-requires", "Microsoft.Component.MSBuild", "-version", "[16.0,]", "-find", @"MSBuild\**\Bin\MSBuild.exe" };
-
-        var (exitCode, stdOut, _) = await new ProcessStartInfo(vsWhereExe) {
-            Arguments = ArgumentEscaper.EscapeAndConcatenate(args)
-        }.GetOutputAsync();
-
-        if (exitCode == 0 && !string.IsNullOrWhiteSpace(stdOut)) return stdOut;
-        return null;
-    }
 }