Clean up a few ifdefs (#1016)

dotnet/src/Microsoft.Agents.AI.Abstractions/AgentRunResponse.cs

@@ -1,14 +1,14 @@
 // Copyright (c) Microsoft. All rights reserved.
 
 using System;
-#if NET9_0_OR_GREATER
+#if NET
 using System.Buffers;
 #endif
 using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 
-#if NET9_0_OR_GREATER
+#if NET
 using System.Text;
 #endif
 using System.Text.Json;

dotnet/src/Microsoft.Agents.AI.Workflows.Declarative/Interpreter/DeclarativeActionExecutor.cs

@@ -118,7 +118,7 @@ internal abstract class DeclarativeActionExecutor : Executor<ActionExecutorResul
             $"""
             STATE: {this.GetType().Name} [{this.Id}]
              NAME: {targetPath}
-            VALUE:{valuePosition}{result.Format()} ({result.GetType().Name})
+            VALUE:{valuePosition}{resultValue} ({result.GetType().Name})
             """);
 #endif
     }

dotnet/src/Shared/Demos/SampleEnvironment.cs

@@ -128,7 +128,7 @@ internal static class SampleEnvironment
     public static bool HasShutdownStarted
         => SystemEnvironment.HasShutdownStarted;
 
-#if NET9_0_OR_GREATER
+#if NET
     public static int ProcessId
         => SystemEnvironment.ProcessId;