Add README.md to NuGet packages

[nohwnd]

Summary

Add README.md files to all NuGet packages produced by vstest to resolve the 'missing a readme' warnings during \�uild.cmd -pack.

Closes #15549

Changes

• Created README.md for 12 packages: Microsoft.NET.Test.Sdk, Microsoft.TestPlatform.Build, Microsoft.TestPlatform.ObjectModel, Microsoft.TestPlatform.TestHost, Microsoft.TestPlatform.AdapterUtilities, Microsoft.TestPlatform.TranslationLayer, Microsoft.TestPlatform.Extensions.TrxLogger, Microsoft.CodeCoverage, Microsoft.TestPlatform, Microsoft.TestPlatform.CLI, Microsoft.TestPlatform.Portable, Microsoft.TestPlatform.Internal.Uwp
• Updated all .nuspec files (including sourcebuild variants) with <readme>\ metadata and <file>\ entries referencing the README via \$\
• Updated \�ng/verify-nupkgs.ps1\ expected file counts (+1 per package for the new README.md)

Each README includes a package description, usage information, and links to the main repository documentation.

Verification

• \�uild.cmd -pack\ passes with 0 errors and no 'missing a readme' warnings

[Copilot]

Pull request overview

Adds per-package README.md files and wires them into vstest-produced NuGet packages to eliminate “missing readme” warnings during packing.

Changes:

• Added README.md files for multiple vstest NuGet packages with basic usage + links.
• Updated nuspecs (including source-build variants) to include <readme> metadata and package the README.md at the package root.
• Updated eng/verify-nupkgs.ps1 expected file counts to account for the added README.md in each package.

Reviewed changes

Copilot reviewed 29 out of 29 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/package/Microsoft.TestPlatform/README.md	Adds NuGet README content for Microsoft.TestPlatform.
src/package/Microsoft.TestPlatform/Microsoft.TestPlatform.nuspec	Includes README in nuspec metadata and files.
src/package/Microsoft.TestPlatform.TestHost/README.md	Adds NuGet README content for TestHost package.
src/package/Microsoft.TestPlatform.TestHost/Microsoft.TestPlatform.TestHost.nuspec	Includes README in nuspec metadata and files.
src/package/Microsoft.TestPlatform.Portable/README.md	Adds NuGet README content for Portable package.
src/package/Microsoft.TestPlatform.Portable/Microsoft.TestPlatform.Portable.nuspec	Includes README in nuspec metadata and files.
src/package/Microsoft.TestPlatform.Internal.Uwp/README.md	Adds NuGet README content for Internal.Uwp package.
src/package/Microsoft.TestPlatform.Internal.Uwp/Microsoft.TestPlatform.Internal.Uwp.nuspec	Includes README in nuspec metadata and files.
src/package/Microsoft.TestPlatform.CLI/README.md	Adds NuGet README content for CLI package.
src/package/Microsoft.TestPlatform.CLI/Microsoft.TestPlatform.CLI.sourcebuild.product.nuspec	Includes README in sourcebuild product nuspec.
src/package/Microsoft.TestPlatform.CLI/Microsoft.TestPlatform.CLI.sourcebuild.nuspec	Includes README in sourcebuild nuspec.
src/package/Microsoft.TestPlatform.CLI/Microsoft.TestPlatform.CLI.nuspec	Includes README in main CLI nuspec.
src/package/Microsoft.NET.Test.Sdk/README.md	Adds NuGet README content for Microsoft.NET.Test.Sdk.
src/package/Microsoft.NET.Test.Sdk/Microsoft.NET.Test.Sdk.nuspec	Includes README in nuspec metadata and files.
src/package/Microsoft.CodeCoverage/README.md	Adds NuGet README content for CodeCoverage package.
src/package/Microsoft.CodeCoverage/Microsoft.CodeCoverage.nuspec	Includes README in nuspec metadata and files.
src/Microsoft.TestPlatform.VsTestConsole.TranslationLayer/README.md	Adds NuGet README content for TranslationLayer package.
src/Microsoft.TestPlatform.VsTestConsole.TranslationLayer/Microsoft.TestPlatform.VsTestConsole.TranslationLayer.nuspec	Includes README in nuspec metadata and files.
src/Microsoft.TestPlatform.ObjectModel/README.md	Adds NuGet README content for ObjectModel package.
src/Microsoft.TestPlatform.ObjectModel/Microsoft.TestPlatform.ObjectModel.nuspec	Includes README in nuspec metadata and files.
src/Microsoft.TestPlatform.Extensions.TrxLogger/README.md	Adds NuGet README content for TRX logger package.
src/Microsoft.TestPlatform.Extensions.TrxLogger/Microsoft.TestPlatform.Extensions.TrxLogger.nuspec	Includes README in nuspec metadata and files.
src/Microsoft.TestPlatform.Build/README.md	Adds NuGet README content for Build package.
src/Microsoft.TestPlatform.Build/Microsoft.TestPlatform.Build.sourcebuild.product.nuspec	Includes README in sourcebuild product nuspec.
src/Microsoft.TestPlatform.Build/Microsoft.TestPlatform.Build.sourcebuild.nuspec	Includes README in sourcebuild nuspec.
src/Microsoft.TestPlatform.Build/Microsoft.TestPlatform.Build.nuspec	Includes README in main Build nuspec.
src/Microsoft.TestPlatform.AdapterUtilities/README.md	Adds NuGet README content for AdapterUtilities package.
src/Microsoft.TestPlatform.AdapterUtilities/Microsoft.TestPlatform.AdapterUtilities.nuspec	Includes README in nuspec metadata and files.
eng/verify-nupkgs.ps1	Updates expected package file counts (+1) to account for README.md.

[nohwnd]

Infra good , content needs review

[nohwnd]

clarifications

[Copilot]

Pull request overview

Copilot reviewed 29 out of 29 changed files in this pull request and generated 4 comments.

[Copilot]

The package appears to be .NET Framework–based (net462 in the nuspec), which effectively makes it Windows-only. The README currently doesn’t mention the platform/runtime constraints, and the dotnet test --collect \"Code Coverage\" example may not apply outside that environment. Consider explicitly stating the supported runtime/platform and, if applicable, pointing cross-platform users to the appropriate alternative collector.

Suggested change

	Code coverage infrastructure for the Visual Studio Test Platform. This package enables collecting code coverage data from `vstest.console.exe` and `dotnet test`.
	Code coverage infrastructure for the Visual Studio Test Platform. This package targets .NET Framework 4.6.2 (`net462`) and is supported on Windows only. It enables collecting code coverage data from `vstest.console.exe` and `dotnet test` on Windows.
	## Platform support
	Microsoft.CodeCoverage runs on Windows only. The `dotnet test --collect "Code Coverage"` example below applies when tests are executed on Windows with this collector available (typically via `Microsoft.NET.Test.Sdk`).
	For cross-platform .NET (for example, .NET Core or .NET 5+), use the cross-platform code coverage collector described in [Code Coverage for .NET Core](https://github.com/microsoft/vstest/blob/main/docs/RFCs/0021-CodeCoverageForNetCore.md) instead of this package.

[Copilot]

The example snippet won’t compile as-is because VsTestConsoleWrapper is missing its namespace/imports (and the sample references several undefined variables). Consider either adding the minimal using/fully-qualified type name for VsTestConsoleWrapper or adjusting the snippet to clearly indicate what types/namespaces the consumer should use so the sample is mechanically actionable.

Suggested change

	```csharp
	var vstestConsolePath = "<path to vstest.console.exe or .dll>";
	var consoleWrapper = new VsTestConsoleWrapper(vstestConsolePath);
	```csharp
	using System;
	using System.Collections.Generic;
	using Microsoft.TestPlatform.VsTestConsole.TranslationLayer;
	using Microsoft.VisualStudio.TestPlatform.ObjectModel.Client;
	var vstestConsolePath = "<path to vstest.console.exe or .dll>";
	var consoleWrapper = new VsTestConsoleWrapper(vstestConsolePath);
	IEnumerable<string> extensionPaths = Array.Empty<string>();
	IEnumerable<string> testAssemblies = new[] { "<path to your test assembly>.dll" };
	string settings = string.Empty;
	ITestDiscoveryEventsHandler2 discoveryHandler = /* your implementation */ null!;
	ITestRunEventsHandler executionHandler = /* your implementation */ null!;

[Copilot]

There are two consecutive blank lines before the '## Links' header. Consider reducing to a single blank line to keep markdown formatting consistent and easier to scan.

Suggested change

[Copilot]

There are two consecutive blank lines before the '## Links' header. Consider reducing to a single blank line to keep markdown formatting consistent and easier to scan.

Suggested change