diff --git a/dotnet/agent-framework-dotnet.slnx b/dotnet/agent-framework-dotnet.slnx
index 0cedcfbdde..9c5f1a81f3 100644
--- a/dotnet/agent-framework-dotnet.slnx
+++ b/dotnet/agent-framework-dotnet.slnx
@@ -101,6 +101,7 @@
+
diff --git a/dotnet/samples/GettingStarted/AgentWithRAG/AgentWithRAG_Step04_FoundryServiceRAG/AgentWithRAG_Step04_FoundryServiceRAG.csproj b/dotnet/samples/GettingStarted/AgentWithRAG/AgentWithRAG_Step04_FoundryServiceRAG/AgentWithRAG_Step04_FoundryServiceRAG.csproj
new file mode 100644
index 0000000000..aefb46524f
--- /dev/null
+++ b/dotnet/samples/GettingStarted/AgentWithRAG/AgentWithRAG_Step04_FoundryServiceRAG/AgentWithRAG_Step04_FoundryServiceRAG.csproj
@@ -0,0 +1,26 @@
+
+
+
+ Exe
+ net9.0
+
+ enable
+ enable
+
+
+
+
+
+
+
+
+
+
+
+
+
+ Always
+
+
+
+
diff --git a/dotnet/samples/GettingStarted/AgentWithRAG/AgentWithRAG_Step04_FoundryServiceRAG/Program.cs b/dotnet/samples/GettingStarted/AgentWithRAG/AgentWithRAG_Step04_FoundryServiceRAG/Program.cs
new file mode 100644
index 0000000000..0989394185
--- /dev/null
+++ b/dotnet/samples/GettingStarted/AgentWithRAG/AgentWithRAG_Step04_FoundryServiceRAG/Program.cs
@@ -0,0 +1,60 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+// This sample shows how to use the built in RAG capabilities that the Foundry service provides when using AI Agents provided by Foundry.
+
+using System.ClientModel;
+using Azure.AI.Projects;
+using Azure.Identity;
+using Microsoft.Agents.AI;
+using Microsoft.Extensions.AI;
+using OpenAI;
+using OpenAI.Files;
+using OpenAI.VectorStores;
+
+var endpoint = Environment.GetEnvironmentVariable("AZURE_FOUNDRY_PROJECT_ENDPOINT") ?? throw new InvalidOperationException("AZURE_FOUNDRY_PROJECT_ENDPOINT is not set.");
+var deploymentName = Environment.GetEnvironmentVariable("AZURE_FOUNDRY_PROJECT_DEPLOYMENT_NAME") ?? "gpt-4o-mini";
+
+// Create an AI Project client and get an OpenAI client that works with the foundry service.
+AIProjectClient aiProjectClient = new(
+ new Uri(endpoint),
+ new AzureCliCredential());
+OpenAIClient openAIClient = aiProjectClient.GetProjectOpenAIClient();
+
+// Upload the file that contains the data to be used for RAG to the Foundry service.
+OpenAIFileClient fileClient = openAIClient.GetOpenAIFileClient();
+ClientResult uploadResult = await fileClient.UploadFileAsync(
+ filePath: "contoso-outdoors-knowledge-base.md",
+ purpose: FileUploadPurpose.Assistants);
+
+// Create a vector store in the Foundry service using the uploaded file.
+VectorStoreClient vectorStoreClient = openAIClient.GetVectorStoreClient();
+ClientResult vectorStoreCreate = await vectorStoreClient.CreateVectorStoreAsync(options: new VectorStoreCreationOptions()
+{
+ Name = "contoso-outdoors-knowledge-base",
+ FileIds = { uploadResult.Value.Id }
+});
+
+var fileSearchTool = new HostedFileSearchTool() { Inputs = [new HostedVectorStoreContent(vectorStoreCreate.Value.Id)] };
+
+AIAgent agent = await aiProjectClient
+ .CreateAIAgentAsync(
+ model: deploymentName,
+ name: "AskContoso",
+ instructions: "You are a helpful support specialist for Contoso Outdoors. Answer questions using the provided context and cite the source document when available.",
+ tools: [fileSearchTool]);
+
+AgentThread thread = agent.GetNewThread();
+
+Console.WriteLine(">> Asking about returns\n");
+Console.WriteLine(await agent.RunAsync("Hi! I need help understanding the return policy.", thread));
+
+Console.WriteLine("\n>> Asking about shipping\n");
+Console.WriteLine(await agent.RunAsync("How long does standard shipping usually take?", thread));
+
+Console.WriteLine("\n>> Asking about product care\n");
+Console.WriteLine(await agent.RunAsync("What is the best way to maintain the TrailRunner tent fabric?", thread));
+
+// Cleanup
+await fileClient.DeleteFileAsync(uploadResult.Value.Id);
+await vectorStoreClient.DeleteVectorStoreAsync(vectorStoreCreate.Value.Id);
+await aiProjectClient.Agents.DeleteAgentAsync(agent.Name);
diff --git a/dotnet/samples/GettingStarted/AgentWithRAG/AgentWithRAG_Step04_FoundryServiceRAG/contoso-outdoors-knowledge-base.md b/dotnet/samples/GettingStarted/AgentWithRAG/AgentWithRAG_Step04_FoundryServiceRAG/contoso-outdoors-knowledge-base.md
new file mode 100644
index 0000000000..901e45b4dd
--- /dev/null
+++ b/dotnet/samples/GettingStarted/AgentWithRAG/AgentWithRAG_Step04_FoundryServiceRAG/contoso-outdoors-knowledge-base.md
@@ -0,0 +1,19 @@
+# Contoso Outdoors Knowledge Base
+
+## Contoso Outdoors Return Policy
+
+Customers may return any item within 30 days of delivery. Items should be unused and include original packaging. Refunds are issued to the original payment method within 5 business days of inspection.
+
+## Contoso Outdoors Shipping Guide
+
+Standard shipping is free on orders over $50 and typically arrives in 3-5 business days within the continental United States. Expedited options are available at checkout.
+
+## Product Information
+
+### TrailRunner Tent
+
+The TrailRunner Tent is a lightweight, 2-person tent designed for easy setup and durability. It features waterproof materials, ventilation windows, and a compact carry bag.
+
+#### Care Instructions
+
+Clean the tent fabric with lukewarm water and a non-detergent soap. Allow it to air dry completely before storage and avoid prolonged UV exposure to extend the lifespan of the waterproof coating.
\ No newline at end of file
diff --git a/dotnet/samples/GettingStarted/AgentWithRAG/README.md b/dotnet/samples/GettingStarted/AgentWithRAG/README.md
index bf2a8f9b11..d606ac767c 100644
--- a/dotnet/samples/GettingStarted/AgentWithRAG/README.md
+++ b/dotnet/samples/GettingStarted/AgentWithRAG/README.md
@@ -7,3 +7,4 @@ These samples show how to create an agent with the Agent Framework that uses Ret
|[Basic Text RAG](./AgentWithRAG_Step01_BasicTextRAG/)|This sample demonstrates how to create and run a basic agent with simple text Retrieval Augmented Generation (RAG).|
|[RAG with Vector Store and custom schema](./AgentWithRAG_Step02_CustomVectorStoreRAG/)|This sample demonstrates how to create and run an agent that uses Retrieval Augmented Generation (RAG) with a vector store. It also uses a custom schema for the documents stored in the vector store.|
|[RAG with custom RAG data source](./AgentWithRAG_Step03_CustomRAGDataSource/)|This sample demonstrates how to create and run an agent that uses Retrieval Augmented Generation (RAG) with a custom RAG data source.|
+|[RAG with Foundry VectorStore service](./AgentWithRAG_Step04_FoundryServiceRAG/)|This sample demonstrates how to create and run an agent that uses Retrieval Augmented Generation (RAG) with the Foundry VectorStore service.|