Add polyfill for Environment.ProcessId

[Tyrrrz]

No description provided.

[Copilot]

Pull Request Overview

This PR adds a polyfill for Environment.ProcessId, which provides access to the current process ID for .NET versions prior to .NET 5.0. This allows developers targeting older frameworks to use the modern Environment.ProcessId API.

• Implements Environment.ProcessId polyfill for pre-.NET 5.0 frameworks
• Adds comprehensive test coverage for the new polyfill in the Net50 test suite
• Follows the existing polyfill pattern used in the codebase (e.g., similar to Environment.ProcessPath in Net60)

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
PolyShim/Net50/Environment.cs	Adds ProcessId property that returns the current process ID using Process.GetCurrentProcess().Id
PolyShim.Tests/Net50/EnvironmentTests.cs	Adds unit test to verify ProcessId returns the correct value
PolyShim.Tests/Net60/EnvironmentTests.cs	Adds unit test for ProcessPath (appears to be related cleanup/organization)

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.00%. Comparing base (bd63973) to head (5430620).
⚠️ Report is 5 commits behind head on master.

Additional details and impacted files

@@     Coverage Diff      @@
##   master   #25   +/-   ##
============================
============================

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[Copilot]

Pull Request Overview

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

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.