support net9.0

Author: JC-386

eng/Packages.Data.props

@@ -377,7 +377,7 @@
     <PackageReference Update="Microsoft.AspNetCore.Server.Kestrel.Core" Version="2.3.6" />
     <PackageReference Update="Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets" Version="2.3.0" />
     <PackageReference Update="Microsoft.AspNetCore.Server.WebListener" Version="1.1.4" />
-    <PackageReference Update="Microsoft.AspNetCore.TestHost" Version="8.0.21"/>
+    <PackageReference Update="Microsoft.AspNetCore.TestHost" Version="8.*" />
     <PackageReference Update="Microsoft.AspNetCore.Http" Version="2.3.0" />
     <PackageReference Update="Microsoft.Azure.Core.Spatial" Version="1.0.0" />
     <PackageReference Update="Microsoft.Azure.Core.NewtonsoftJson" Version="1.0.0" />
@@ -474,6 +474,11 @@
     <PackageDownload Include="Azure.Sdk.Tools.Testproxy" Version="[$(TestProxyVersion)]" />
   </ItemGroup>
 
+  <ItemGroup Condition="('$(TargetFramework)' == 'net9.0' AND ('$(IsTestProject)' == 'true') OR ('$(IsTestSupportProject)' == 'true') OR ('$(IsPerfProject)' == 'true') OR ('$(IsStressProject)' == 'true') OR ('$(IsSamplesProject)' == 'true'))">
+    <PackageReference Update="Microsoft.AspNetCore.TestHost" Version="9.*" />
+    <PackageReference Update="Microsoft.AspNetCore.Mvc.Testing" Version="9.*" />
+  </ItemGroup>
+
   <ItemGroup Condition="'$(IsClientLibrary)' == 'true' and $(MSBuildProjectName.StartsWith('Microsoft.ClientModel.TestFramework'))">
     <PackageReference Update="NUnit" Version="4.4.0" />
     <PackageReference Update="Castle.Core" Version="5.1.0" />

sdk/agentserver/Azure.AI.AgentServer.AgentFramework/src/Azure.AI.AgentServer.AgentFramework.csproj

@@ -1,8 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <!-- Approved override to LtsTargetFramework -->
-    <RequiredTargetFrameworks>$(LtsTargetFramework)</RequiredTargetFrameworks>
-    <TargetFrameworks>$(LtsTargetFramework)</TargetFrameworks>
+    <!-- Approved override -->
+    <RequiredTargetFrameworks>net9.0;$(LtsTargetFramework);</RequiredTargetFrameworks>
+    <TargetFrameworks>$(RequiredTargetFrameworks)</TargetFrameworks>
 
     <PackageTags>Azure.AI.AgentServer.AgentFramework</PackageTags>
   </PropertyGroup>

sdk/agentserver/Azure.AI.AgentServer.Core/src/Azure.AI.AgentServer.Core.csproj

@@ -1,8 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <!-- Approved override to LtsTargetFramework -->
-    <RequiredTargetFrameworks>$(LtsTargetFramework)</RequiredTargetFrameworks>
-    <TargetFrameworks>$(LtsTargetFramework)</TargetFrameworks>
+    <!-- Approved override -->
+    <RequiredTargetFrameworks>net9.0;$(LtsTargetFramework);</RequiredTargetFrameworks>
+    <TargetFrameworks>$(RequiredTargetFrameworks)</TargetFrameworks>
 
     <PackageTags>Azure.AI.AgentServer.Core</PackageTags>
   </PropertyGroup>

sdk/agentserver/Azure.AI.AgentServer.Core/tests/Agents.Customized.Integration.Tests/Agents.Customized.Integration.Tests.csproj

@@ -1,9 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <RequiredTargetFrameworks>$(LtsTargetFramework)</RequiredTargetFrameworks>
-    <TargetFrameworks>$(LtsTargetFramework)</TargetFrameworks>
-
     <GenerateProgramFile>false</GenerateProgramFile>
   </PropertyGroup>
 

sdk/agentserver/Azure.AI.AgentServer.Core/tests/Core.Integration.Tests/Azure.AI.AgentServer.Core.Integration.Tests.csproj

@@ -1,8 +1,5 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <RequiredTargetFrameworks>$(LtsTargetFramework)</RequiredTargetFrameworks>
-    <TargetFrameworks>$(LtsTargetFramework)</TargetFrameworks>
-
     <!-- We don't care about XML doc comments on test types and members -->
     <NoWarn>$(NoWarn);CS1591;SA1010;SA1200;SA1600;</NoWarn>
   </PropertyGroup>