chore: import upstream snapshot with attribution

dotnet/samples/Demos/AgentFrameworkWithAspire/ChatWithAgent.Configuration/RagConfig.cs

@@ -0,0 +1,33 @@
+// Copyright (c) Microsoft. All rights reserved.
+
+using System.ComponentModel.DataAnnotations;
+
+namespace ChatWithAgent.Configuration;
+
+/// <summary>
+/// Contains settings to control the RAG experience.
+/// </summary>
+public sealed class RagConfig
+{
+    /// <summary>
+    /// Configuration section name.
+    /// </summary>
+    public const string ConfigSectionName = "RagConfig";
+
+    /// <summary>
+    /// The AI embeddings service to use.
+    /// </summary>
+    [Required]
+    public string AIEmbeddingService { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Type of the vector store.
+    /// </summary>
+    [Required]
+    public string VectorStoreType { get; set; } = string.Empty;
+
+    /// <summary>
+    /// The name of the collection.
+    /// </summary>
+    public string? CollectionName { get; set; }
+}