Version update

[wforney]

• Updated all projects to VS 2019, .NET Framework 4.8, and latest Windows 10 target for the C++ project

[nvella]

Hi @wforney, seems mostly solid. There are a few errors in the CI build as it's still running 2017, appveyor.yml and build.ps1 may need to be updated. https://ci.appveyor.com/project/dotnetfoundation/openlivewriter/builds/27712275#L246

[nvella]

Hi @wforney, I found some docs which might help out;
https://github.com/microsoft/vssetup.powershell/blob/develop/docs/VSSetup/Select-VSSetupInstance.md#-version

It might be worth changing the version specifier from [15.0,16.0) to [16.0,17.0) - this specifies exactly v16 (Visual Studio 2019). Cheers 👍

[Copilot]

Pull request overview

This pull request updates the OpenLiveWriter project from Visual Studio 2017 to Visual Studio 2019, upgrades all .NET Framework projects from version 4.6.1/4.7.2 to 4.8, and updates the C++ project to use the latest Windows 10 SDK (10.0) with the v142 platform toolset.

Changes:

• Updated C++ project to use Windows SDK 10.0 and Visual Studio 2019 toolset (v142)
• Upgraded all managed projects to target .NET Framework 4.8
• Updated build infrastructure (build.ps1, appveyor.yml) to use Visual Studio 2019
• Updated test dependencies (NUnit 3.4.1→3.12.0, ApprovalTests 3.0.11→4.2.2)

Reviewed changes

Copilot reviewed 45 out of 48 changed files in this pull request and generated 9 comments.

Show a summary per file

File	Description
src/unmanaged/OpenLiveWriter.Ribbon/OpenLiveWriter.Ribbon.vcxproj	Updated C++ project to Windows SDK 10.0 and v142 toolset
src/managed/writer.sln	Added build script references to solution items
src/managed/*/*.csproj (multiple)	Added TargetFrameworkVersion v4.8 to all managed projects
src/managed/*/app.config (multiple)	Updated supportedRuntime to .NET Framework 4.8
src/managed/OpenLiveWriter.Tests/packages.config	Updated NUnit and ApprovalTests packages to newer versions
build.ps1	Updated build script for VS 2019 (MSBuild path and error messages)
appveyor.yml	Changed build image from VS 2017 to VS 2019
src/managed/LocEdit/Properties/*.Designer.cs	Auto-generated code updated to VS 2019 tooling version

Files not reviewed (3)

• src/managed/LocEdit/Properties/Resources.Designer.cs: Language not supported
• src/managed/LocEdit/Properties/Settings.Designer.cs: Language not supported
• src/managed/OpenLiveWriter.Localization/Images.Designer.cs: Language not supported

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