[.Net] release v0.2.0 (#3483)

* release 0.2.0

* update release noteb

dotnet/eng/MetaInfo.props

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
     <PropertyGroup>
-        <VersionPrefix>0.1.0</VersionPrefix>
+        <VersionPrefix>0.2.0</VersionPrefix>
         <Authors>AutoGen</Authors>
         <PackageProjectUrl>https://microsoft.github.io/autogen-for-net/</PackageProjectUrl>
         <RepositoryUrl>https://github.com/microsoft/autogen</RepositoryUrl>

dotnet/website/release_note/0.2.0.md

@@ -0,0 +1,48 @@
+# Release Notes for AutoGen.Net v0.2.0 🚀
+
+## New Features 🌟
+- **OpenAI Structural Format Output**: Added support for structural output format in the OpenAI integration. You can check out the example [here](https://github.com/microsoft/autogen/blob/main/dotnet/sample/AutoGen.OpenAI.Sample/Structural_Output.cs) ([#3482](https://github.com/microsoft/autogen/issues/3482)).
+- **Structural Output Configuration**: Introduced a property for overriding the structural output schema when generating replies with `GenerateReplyOption` ([#3436](https://github.com/microsoft/autogen/issues/3436)).
+
+## Bug Fixes 🐛
+- **Fixed Error Code 500**: Resolved an issue where an error occurred when the message history contained multiple different tool calls with the `name` field ([#3437](https://github.com/microsoft/autogen/issues/3437)).
+
+## Improvements 🔧
+- **Leverage OpenAI V2.0 in AutoGen.OpenAI  package**: The `AutoGen.OpenAI` package now uses OpenAI v2.0, providing improved functionality and performance. In the meantime, the original `AutoGen.OpenAI` is still available and can be accessed by `AutoGen.OpenAI.V1`. This allows users who prefer to continue to use `Azure.AI.OpenAI v1` package in their project. ([#3193](https://github.com/microsoft/autogen/issues/3193)).
+- **Deprecation of GPTAgent**: `GPTAgent` has been deprecated in favor of `OpenAIChatAgent` and `OpenAIMessageConnector` ([#3404](https://github.com/microsoft/autogen/issues/3404)).
+
+## Documentation 📚
+- **Tool Call Instructions**: Added detailed documentation on using tool calls with `ollama` and `OpenAIChatAgent` ([#3248](https://github.com/microsoft/autogen/issues/3248)).
+
+### Migration Guides 🔄
+
+#### For the Deprecation of `GPTAgent` ([#3404](https://github.com/microsoft/autogen/issues/3404)):
+**Before:**
+```csharp
+var agent = new GPTAgent(...);
+```
+**After:**
+```csharp
+var agent = new OpenAIChatAgent(...)
+    .RegisterMessageConnector();
+```
+
+#### For Using Azure.AI.OpenAI v2.0 ([#3193](https://github.com/microsoft/autogen/issues/3193)):
+**Previous way of creating `OpenAIChatAgent`:**
+```csharp
+var openAIClient = new OpenAIClient(apiKey);
+var openAIClientAgent = new OpenAIChatAgent(
+            openAIClient: openAIClient,
+            model: "gpt-4o-mini",
+            // Other parameters...
+            );
+```
+
+**New way of creating `OpenAIChatAgent`:**
+```csharp
+var openAIClient = new OpenAIClient(apiKey);
+var openAIClientAgent = new OpenAIChatAgent(
+            chatClient: openAIClient.GetChatClient("gpt-4o-mini"),
+            // Other parameters...
+            );
+```

dotnet/website/release_note/toc.yml

@@ -1,3 +1,6 @@
+- name: 0.2.0
+  href: 0.2.0.md
+
 - name: 0.1.0
   href: 0.1.0.md