.NET: Update analyzers for .NET 10 SDK

[stephentoub]

No description provided.

[Copilot]

Pull request overview

This PR updates the codebase to leverage .NET 10 SDK analyzers and modern C# language features. The changes primarily focus on adopting collection expressions, pattern matching enhancements, switch expressions, and performance improvements through logging guard clauses.

Key Changes:

• Updated AnalysisLevel from latest/AllEnabledByDefault to 10.0-all for .NET 10 SDK compatibility
• Modernized collection initialization syntax using collection expressions ([] instead of new List<T>(), Array.Empty<T>(), etc.)
• Added logging guard clauses (IsEnabled checks) to prevent expensive logging argument evaluation when logging is disabled
• Converted to modern pattern matching (is not (Type1 or Type2), switch expressions)

Reviewed changes

Copilot reviewed 41 out of 41 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
dotnet/Directory.Build.props	Updated AnalysisLevel to target .NET 10 with all analyzers enabled
dotnet/tests/.editorconfig	Added suppressions for new .NET 10 analyzers in test projects (CA1822, CA1873, CA1875, CA2249)
dotnet/samples/.editorconfig	Added CA1873 suppression for sample projects
dotnet/src/Microsoft.Agents.AI/Memory/ChatHistoryMemoryProvider.cs	Added logging guard clauses for performance optimization
dotnet/src/Microsoft.Agents.AI/Data/TextSearchProvider.cs	Added logging guard clauses for performance optimization
dotnet/src/Microsoft.Agents.AI.Workflows/WorkflowBuilder.cs	Converted to collection expression syntax
dotnet/src/Microsoft.Agents.AI.Workflows/Execution/FanInEdgeState.cs	Converted to collection expression syntax
dotnet/src/Microsoft.Agents.AI.Workflows/Execution/EdgeConnection.cs	Converted to collection expression syntax
dotnet/src/Microsoft.Agents.AI.Workflows/Checkpointing/RepresentationExtensions.cs	Converted to collection expression syntax
dotnet/src/Microsoft.Agents.AI.Purview/ScopedContentProcessor.cs	Converted to switch expression and collection expression syntax
dotnet/src/Microsoft.Agents.AI.Purview/PurviewWrapper.cs	Added logging guard clauses
dotnet/src/Microsoft.Agents.AI.Purview/PurviewClient.cs	Added logging guard clauses and collection expression syntax
dotnet/src/Microsoft.Agents.AI.Purview/PurviewAppLocation.cs	Converted to switch expression
dotnet/src/Microsoft.Agents.AI.Purview/ChannelHandler.cs	Added logging guard clauses
dotnet/src/Microsoft.Agents.AI.Purview/BackgroundJobRunner.cs	Added logging guard clauses
dotnet/src/Microsoft.Agents.AI.Mem0/Mem0Provider.cs	Added logging guard clauses
dotnet/src/Microsoft.Agents.AI.Mem0/Mem0Client.cs	Converted to collection expression syntax
dotnet/src/Microsoft.Agents.AI.Hosting.OpenAI/Responses/HostedAgentResponseExecutor.cs	Added logging guard clauses
dotnet/src/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore/AGUIServerSentEventsResult.cs	Removed unused StatusCode property
dotnet/src/Microsoft.Agents.AI.DurableTask/State/DurableAgentStateFunctionCallContent.cs	Changed from ToImmutableDictionary to ToDictionary
dotnet/src/Microsoft.Agents.AI.DurableTask/DurableAIAgent.cs	Simplified object initialization syntax
dotnet/src/Microsoft.Agents.AI.DevUI/DevUIMiddleware.cs	Added logging guard clauses
dotnet/src/Microsoft.Agents.AI.CosmosNoSql/CosmosChatMessageStore.cs	Updated to use JsonElement.Deserialize extension method
dotnet/src/Microsoft.Agents.AI.CopilotStudio/ActivityProcessor.cs	Added logging guard clause
dotnet/src/Microsoft.Agents.AI.AGUI/AGUIChatClient.cs	Added logging guard clauses
dotnet/src/Microsoft.Agents.AI.A2A/A2AAgent.cs	Converted to pattern matching with or
dotnet/samples/GettingStarted/AgentProviders/Agent_With_GoogleGemini/GeminiChatClient.cs	Extensive conversion to collection expression syntax
dotnet/tests/Microsoft.Agents.AI.Workflows.UnitTests/TestEchoAgent.cs	Converted to collection expression syntax
dotnet/tests/Microsoft.Agents.AI.UnitTests/Memory/ChatHistoryMemoryProviderTests.cs	Updated test assertion to use IsType with exactMatch parameter
dotnet/tests/Microsoft.Agents.AI.UnitTests/Data/TextSearchProviderTests.cs	Converted test data to collection expression syntax
dotnet/tests/Microsoft.Agents.AI.Purview.UnitTests/ScopedContentProcessorTests.cs	Converted test data to collection expression syntax
dotnet/tests/Microsoft.Agents.AI.Purview.UnitTests/PurviewClientTests.cs	Converted test data to collection expression syntax
dotnet/tests/Microsoft.Agents.AI.Mem0.UnitTests/Mem0ProviderTests.cs	Converted test data to collection expression syntax and updated assertions
dotnet/tests/Microsoft.Agents.AI.Mem0.IntegrationTests/Mem0ProviderTests.cs	Converted test data to collection expression syntax
dotnet/tests/Microsoft.Agents.AI.Hosting.AGUI.AspNetCore.UnitTests/AGUIServerSentEventsResultTests.cs	Removed assertion for deleted StatusCode property
dotnet/tests/Microsoft.Agents.AI.CosmosNoSql.UnitTests/CosmosCheckpointStoreTests.cs	Converted to modern pattern matching syntax
dotnet/tests/Microsoft.Agents.AI.CosmosNoSql.UnitTests/CosmosChatMessageStoreTests.cs	Converted to collection expression syntax
dotnet/tests/Microsoft.Agents.AI.AzureAI.UnitTests/AzureAIProjectChatClientExtensionsTests.cs	Simplified MockPipelineResponse to use auto-property
dotnet/tests/Microsoft.Agents.AI.AGUI.UnitTests/AGUIChatClientTests.cs	Converted to collection spread expression
dotnet/tests/Microsoft.Agents.AI.A2A.UnitTests/Extensions/A2AArtifactExtensionsTests.cs	Converted to collection expression syntax
dotnet/tests/Microsoft.Agents.AI.A2A.UnitTests/A2AAgentTests.cs	Converted to pattern matching with or

Comments suppressed due to low confidence (1)

dotnet/src/Microsoft.Agents.AI.Mem0/Mem0Provider.cs:177

• The nested IsEnabled check for LogLevel.Trace is redundant and creates a logic issue. Similar to the TextSearchProvider issue, this nests the Trace check inside the Information check, which means Trace logs will only be written if Information level is enabled. Since Trace is a more verbose level than Information, this should be a separate independent check. The checks should be:

if (this._logger?.IsEnabled(LogLevel.Information) is true)
{
    this._logger.LogInformation(...);
}

if (outputMessageText is not null && this._logger?.IsEnabled(LogLevel.Trace) is true)
{
    this._logger.LogTrace(...);
}

            if (this._logger?.IsEnabled(LogLevel.Information) is true)
            {
                this._logger.LogInformation(
                    "Mem0AIContextProvider: Retrieved {Count} memories. ApplicationId: '{ApplicationId}', AgentId: '{AgentId}', ThreadId: '{ThreadId}', UserId: '{UserId}'.",
                    memories.Count,
                    this._searchScope.ApplicationId,
                    this._searchScope.AgentId,
                    this._searchScope.ThreadId,
                    this.SanitizeLogData(this._searchScope.UserId));

                if (outputMessageText is not null && this._logger.IsEnabled(LogLevel.Trace))
                {
                    this._logger.LogTrace(
                        "Mem0AIContextProvider: Search Results\nInput:{Input}\nOutput:{MessageText}\nApplicationId: '{ApplicationId}', AgentId: '{AgentId}', ThreadId: '{ThreadId}', UserId: '{UserId}'.",
                        this.SanitizeLogData(queryText),
                        this.SanitizeLogData(outputMessageText),
                        this._searchScope.ApplicationId,
                        this._searchScope.AgentId,
                        this._searchScope.ThreadId,
                        this.SanitizeLogData(this._searchScope.UserId));
                }
            }