.NET: added Mem0Sharp integration for in-memory storage in agent samples.

dotnet/Directory.Packages.props

@@ -109,6 +109,7 @@
     <PackageVersion Include="CommunityToolkit.VectorData.Qdrant" Version="1.0.0" />
     <!-- Agent SDKs -->
     <PackageVersion Include="GitHub.Copilot.SDK" Version="1.0.5" />
+    <PackageVersion Include="Mem0Sharp" Version="0.2.1" />
     <PackageVersion Include="ResponsibleAI.AgentHooks" Version="0.1.0-alpha.4" />
     <PackageVersion Include="Microsoft.Agents.CopilotStudio.Client" Version="1.3.171-beta" />
     <!-- M365 Agents SDK -->

dotnet/agent-framework-dotnet.slnx

@@ -193,6 +193,7 @@
     <Project Path="samples/02-agents/AgentWithMemory/AgentWithMemory_Step06_MemoryUsingAgentMemory/AgentWithMemory_Step06_MemoryUsingAgentMemory.csproj" />
     <Project Path="samples/02-agents/AgentWithMemory/AgentWithMemory_Step07_FileMemoryProvider/AgentWithMemory_Step07_FileMemoryProvider.csproj" />
     <Project Path="samples/02-agents/AgentWithMemory/AgentWithMemory_Step08_MemoryUsingCosmosNoSql/AgentWithMemory_Step08_MemoryUsingCosmosNoSql.csproj" />
+    <Project Path="samples/02-agents/AgentWithMemory/AgentWithMemory_Step09_MemoryUsingMem0Sharp/AgentWithMemory_Step09_MemoryUsingMem0Sharp.csproj" />
   </Folder>
   <Folder Name="/Samples/02-agents/AgentProviders/openai/">
     <File Path="samples/02-agents/AgentProviders/openai/README.md" />
@@ -677,4 +678,3 @@
     <Project Path="tests/Microsoft.Agents.AI.Workflows.UnitTests/Microsoft.Agents.AI.Workflows.UnitTests.csproj" />
   </Folder>
 </Solution>
-

dotnet/samples/02-agents/AgentWithMemory/AgentWithMemory_Step09_MemoryUsingMem0Sharp/AgentWithMemory_Step09_MemoryUsingMem0Sharp.csproj

@@ -0,0 +1,16 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFrameworks>net10.0</TargetFrameworks>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Azure.Identity" />
+    <PackageReference Include="Mem0Sharp" />
+    <ProjectReference Include="..\..\..\..\src\Microsoft.Agents.AI.Foundry\Microsoft.Agents.AI.Foundry.csproj" />
+  </ItemGroup>
+
+</Project>

dotnet/samples/02-agents/AgentWithMemory/AgentWithMemory_Step09_MemoryUsingMem0Sharp/Mem0SharpProvider.cs

@@ -0,0 +1,37 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using Mem0Sharp;
+using Microsoft.Agents.AI;
+using Microsoft.Extensions.AI;
+
+internal sealed class Mem0SharpProvider(MemoryService memory, string userId) : AIContextProvider
+{
+    protected override async ValueTask StoreAIContextAsync(
+        InvokedContext context,
+        CancellationToken cancellationToken = default)
+    {
+        foreach (ChatMessage message in context.RequestMessages.Where(message => message.Role == ChatRole.User && !string.IsNullOrWhiteSpace(message.Text)))
+        {
+            await memory.AddAsync(
+                message.Text!,
+                new MemoryAddOptions { UserId = userId, Infer = false },
+                cancellationToken);
+        }
+    }
+
+    protected override async ValueTask<AIContext> ProvideAIContextAsync(
+        InvokingContext context,
+        CancellationToken cancellationToken = default)
+    {
+        var memories = await memory.GetAllAsync(
+            new MemoryFilter(UserId: userId),
+            cancellationToken: cancellationToken);
+
+        return memories.Count == 0
+            ? new AIContext()
+            : new AIContext
+            {
+                Instructions = $"Relevant memories for this user:\n{string.Join(Environment.NewLine, memories.Select(item => $"- {item.Text}"))}",
+            };
+    }
+}

dotnet/samples/02-agents/AgentWithMemory/AgentWithMemory_Step09_MemoryUsingMem0Sharp/Program.cs

@@ -0,0 +1,32 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+// This sample shows how to use Mem0Sharp's in-memory store with an Agent Framework agent.
+
+using Azure.AI.Projects;
+using Azure.Identity;
+using Mem0Sharp;
+using Microsoft.Agents.AI;
+
+var endpoint = Environment.GetEnvironmentVariable("FOUNDRY_PROJECT_ENDPOINT")
+    ?? throw new InvalidOperationException("FOUNDRY_PROJECT_ENDPOINT is not set.");
+var deploymentName = Environment.GetEnvironmentVariable("FOUNDRY_MODEL") ?? "gpt-5.4-mini";
+
+var memory = new MemoryService();
+AIProjectClient aiProjectClient = new(new Uri(endpoint), new DefaultAzureCredential());
+
+// WARNING: DefaultAzureCredential is convenient for development but requires careful consideration in production.
+// In production, consider using a specific credential (e.g., ManagedIdentityCredential) to avoid
+// latency issues, unintended credential probing, and potential security risks from fallback mechanisms.
+AIAgent agent = aiProjectClient
+    .AsAIAgent(new ChatClientAgentOptions
+    {
+        ChatOptions = new() { ModelId = deploymentName, Instructions = "You are a helpful assistant. Use remembered preferences when relevant, and do not invent memories." },
+        AIContextProviders = [new Mem0SharpProvider(memory, userId: "sample-user")],
+    });
+
+AgentSession session = await agent.CreateSessionAsync();
+Console.WriteLine(await agent.RunAsync("I prefer window seats when I fly.", session));
+
+Console.WriteLine("\n>> Start a new session that shares the same Mem0Sharp memory\n");
+AgentSession newSession = await agent.CreateSessionAsync();
+Console.WriteLine(await agent.RunAsync("Which seat should I book for my next flight?", newSession));

dotnet/samples/02-agents/AgentWithMemory/AgentWithMemory_Step09_MemoryUsingMem0Sharp/README.md

@@ -0,0 +1,33 @@
+# Agent with Memory Using Mem0Sharp
+
+This sample uses the [`Mem0Sharp`](https://www.nuget.org/packages/Mem0Sharp) NuGet package as a local, in-memory store for an Agent Framework agent. It stores a user preference and recalls it from a new agent session without requiring a memory service or database.
+
+## Prerequisites
+
+1. [.NET 10 SDK](https://dotnet.microsoft.com/download/dotnet/10.0)
+2. A Microsoft Foundry project with a chat model deployment
+3. Azure CLI authentication (`az login`)
+
+## Configuration
+
+| Variable | Description | Default |
+|---|---|---|
+| `FOUNDRY_PROJECT_ENDPOINT` | Microsoft Foundry project endpoint | *(required)* |
+| `FOUNDRY_MODEL` | Chat model deployment name | `gpt-5.4-mini` |
+
+## Run the Sample
+
+```bash
+dotnet run
+```
+
+## Storage Providers
+
+This sample uses `MemoryService`'s default in-memory store, so memories do not survive application restarts. Mem0Sharp also supports:
+
+- Qdrant through `QdrantMemoryStore`, included in the core `Mem0Sharp` package
+- PostgreSQL with pgvector through the [`Mem0Sharp.PostgreSQL`](https://www.nuget.org/packages/Mem0Sharp.PostgreSQL) package
+- SQLite through the [`Mem0Sharp.SQLite`](https://www.nuget.org/packages/Mem0Sharp.SQLite) package
+- Custom providers by implementing `IMemoryStore` and, when needed, optional interfaces such as `IVectorMemoryStore` or `IMemoryHistoryStore`
+
+Pass the configured store to `MemoryService` to replace the in-memory store. See the [Mem0Sharp providers and persistence guide](https://github.com/jihadkhawaja/mem0sharp/blob/main/docs/providers-and-persistence.md) for setup examples.

dotnet/samples/02-agents/AgentWithMemory/README.md

@@ -12,6 +12,7 @@ These samples show how to create an agent with the Agent Framework that uses Mem
 |[Memory Using AgentMemory](./AgentWithMemory_Step06_MemoryUsingAgentMemory/)|This sample demonstrates a retail shopping assistant built with [`AgentMemory`](https://www.nuget.org/packages/AgentMemory), an unofficial .NET port of the Neo4j Labs graph-memory provider, to learn customer preferences and recommend products via graph traversal.|
 |[File Based Memory](./AgentWithMemory_Step07_FileMemoryProvider/)|This sample demonstrates how to use the `FileMemoryProvider` to give an agent tools for storing and recalling memories as files, and how to configure the folder that those memory files are written to.|
 |[Memory with Azure Cosmos DB for NoSQL](./AgentWithMemory_Step08_MemoryUsingCosmosNoSql/)|This sample demonstrates how to persist and retrieve chat history across sessions with Azure Cosmos DB for NoSQL.|
+|[Memory with Mem0Sharp](./AgentWithMemory_Step09_MemoryUsingMem0Sharp/)|This sample demonstrates how to use the `Mem0Sharp` NuGet package as an in-memory store for an agent.|
 
 > **See also**: [Memory Search with Foundry Agents](../AgentProviders/foundry/Agent_Step22_MemorySearch/) - demonstrates using the built-in Memory Search tool with Microsoft Foundry agents.