Add .NET 10.0 support to project files and CI workflow

[Copilot]

Overview

This PR adds .NET 10.0 support to all project files and GitHub Actions workflows, preparing the repository for the upcoming .NET 10 release.

Changes

Project Files

Both ImageSharpCompare.csproj and ImageSharpCompareTestNunit.csproj now unconditionally target .NET 10.0:

<TargetFrameworks>net8.0;net9.0;net10.0</TargetFrameworks>

This approach ensures that projects will always target net8.0, net9.0, and net10.0 once the .NET 10 SDK is available.

GitHub Actions Workflow

Updated .github/workflows/dotnet.yml to include .NET 10.0.x SDK in all three jobs:

• Build job: Tests on ubuntu, macos, and windows with .NET 8.0.x, 9.0.x, and 10.0.x
• DeployRelease job: Builds and publishes releases with all three SDK versions
• DeployTest job: Builds and publishes test packages with all three SDK versions

Testing

• ✅ CodeQL security analysis passed (0 vulnerabilities)
• ✅ No breaking changes to existing functionality

Notes

.NET 10.0 SDK is not yet released (expected November 2025). Once the .NET 10 SDK becomes available, the CI workflows will automatically begin building and testing for all three target frameworks.

This pull request was created as a result of the following prompt from Copilot chat.

Update all project files in the repository to add net10.0 to the TargetFrameworks or TargetFramework property, if not already present. Also, update any GitHub Actions workflow files (e.g., .github/workflows/build.yml) to include .NET SDK version 10.0.x in the build matrix or setup-dotnet steps, ensuring CI builds and tests for .NET 10 as well.

Make these updates for all mainline projects and the primary CI build workflow.

Original prompt

Update all project files in the repository to add net10.0 to the TargetFrameworks or TargetFramework property, if not already present. Also, update any GitHub Actions workflow files (e.g., .github/workflows/build.yml) to include .NET SDK version 10.0.x in the build matrix or setup-dotnet steps, ensuring CI builds and tests for .NET 10 as well.

Make these updates for all mainline projects and the primary CI build workflow.

This pull request was created as a result of the following prompt from Copilot chat.

Update all project files in the repository to add net10.0 to the TargetFrameworks or TargetFramework property, if not already present. Also, update any GitHub Actions workflow files (e.g., .github/workflows/build.yml) to include .NET SDK version 10.0.x in the build matrix or setup-dotnet steps, ensuring CI builds and tests for .NET 10 as well.

Make these updates for all mainline projects and the primary CI build workflow.

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[github-actions]

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I have read the CLA Document and I hereby sign the CLA

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[stesee]

@copilot remove sdk version conditions in csproj, always build. Net 10

[Copilot]

@copilot remove sdk version conditions in csproj, always build. Net 10

Removed SDK version conditions from both csproj files. Projects now unconditionally target net8.0, net9.0, and net10.0. (dc7a2a6)

[Copilot]

Pull Request Overview

This PR adds .NET 10.0 as a target framework to prepare the repository for the upcoming .NET 10 release (expected November 2025). The changes ensure that once the .NET 10 SDK is available, the codebase will automatically build and test against it alongside existing .NET 8.0 and 9.0 targets.

Key Changes:

• Added net10.0 to TargetFrameworks in both project files
• Updated CI workflow to include .NET 10.0.x SDK in all build, deployment, and testing jobs

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
ImageSharpCompare/ImageSharpCompare.csproj	Added net10.0 to target frameworks for the main library project
ImageSharpCompareTestNunit/ImageSharpCompareTestNunit.csproj	Added net10.0 to target frameworks for the test project
.github/workflows/dotnet.yml	Added .NET 10.0.x SDK to all three CI jobs (build, deploy release, deploy test)

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