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dotnet/samples/GettingStarted/FoundryAgents/FoundryAgents_Step13_Plugins/README.md

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+# Using Plugins with AI Agents
+
+This sample demonstrates how to use plugins with AI agents, where plugins are services registered in dependency injection that expose methods as AI function tools.
+
+## What this sample demonstrates
+
+- Creating plugin services with methods to expose as tools
+- Using AsAITools() to selectively expose plugin methods
+- Registering plugins in dependency injection
+- Using plugins with AI agents
+- Managing agent lifecycle (creation and deletion)
+
+## Prerequisites
+
+Before you begin, ensure you have the following prerequisites:
+
+- .NET 10 SDK or later
+- Azure Foundry service endpoint and deployment configured
+- Azure CLI installed and authenticated (for Azure credential authentication)
+
+**Note**: This demo uses Azure CLI credentials for authentication. Make sure you're logged in with `az login` and have access to the Azure Foundry resource. For more information, see the [Azure CLI documentation](https://learn.microsoft.com/cli/azure/authenticate-azure-cli-interactively).
+
+Set the following environment variables:
+
+```powershell
+$env:AZURE_FOUNDRY_PROJECT_ENDPOINT="https://your-foundry-service.services.ai.azure.com/api/projects/your-foundry-project" # Replace with your Azure Foundry resource endpoint
+$env:AZURE_FOUNDRY_PROJECT_DEPLOYMENT_NAME="gpt-4o-mini"  # Optional, defaults to gpt-4o-mini
+```
+
+## Run the sample
+
+Navigate to the FoundryAgents sample directory and run:
+
+```powershell
+cd dotnet/samples/GettingStarted/FoundryAgents
+dotnet run --project .\FoundryAgents_Step13_Plugins
+```
+
+## Expected behavior
+
+The sample will:
+
+1. Create a plugin service with methods to expose as tools
+2. Register the plugin in dependency injection
+3. Create an agent named "PluginAgent" with the plugin methods as function tools
+4. Run the agent with a prompt that triggers it to call plugin methods
+5. The agent will invoke the plugin methods to retrieve information
+6. Clean up resources by deleting the agent
+