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agent-framework/dotnet
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Jacob Alber 2015f0dc09 .NET: [BREAKING] Support Checkpoint Serialization (#735)
* feat: Support Checkpoint Serialization

* Implements serialization roundtripping for checkpoints.
* Adds support for JSON serialization
* Adds FileSystem-based checkpoint persistence

* fix: Executor State does not deserialize correctly

The StateManager was not properly handling delay-deserialized values.

* Fix PortableValue handling in StateManager (this makes it delegate to PortableValue the uwnrapping)
* Fix UnitTest to actually test checkpoint serialization
* Additional review comment fixes

---------

Co-authored-by: Chris <66376200+crickman@users.noreply.github.com>
2015f0dc09 · 2025-09-17 19:57:19 +00:00
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Get Started with Microsoft Agent Framework for C# Developers

Run the Minimal Console demo

The Minimal Console demo is a simple console application which shows how to create and run an agent.

Supported Platforms:

  • .Net: net9.0, net8.0, netstandard2.0, net472
  • OS: Windows, macOS, Linux

If you want to use the latest published packages following the instructions here.

1. Configure required environment variables

This samples uses Azure OpenAI by default so you need to set the following environment variable

$env:AZURE_OPENAI_ENDPOINT = "https://<your deployment>.openai.azure.com/"

If you want to use OpenAI

  1. Edit Program.cs and change the following lines:
    AIAgent agent = new AzureOpenAIClient(
      new Uri(Environment.GetEnvironmentVariable("AZURE_OPENAI_ENDPOINT")!),
      new AzureCliCredential())
       .GetChatClient("gpt-4o-mini")
       .CreateAIAgent(
         instructions: "You are a helpful assistant, you can help the user with weather information.",
         tools: [AIFunctionFactory.Create(GetWeather)]);
    
    To this:
    AIAgent agent = new OpenAIClient(Environment.GetEnvironmentVariable("OPENAI_API_KEY")!)
      .GetChatClient("gpt-4o-mini")
      .CreateAIAgent(
        instructions: "You are a helpful assistant, you can help the user with weather information.",
        tools: [AIFunctionFactory.Create(GetWeather)]);
    
  2. Create an environment variable with your OpenAI key
    $env:OPENAI_API_KEY = "sk-..."
    

2. Build the project

cd demos\MinimalConsole
dotnet build

3. Run the demonstration

dotnet run --framework net9.0 --no-build

Sample output:

The weather in Amsterdam is currently cloudy, with a high temperature of 15°C.