.Net: Fixing some issues with streaming invoke, obsoleting old invoke metho… (#11218)

Fixing some issues with streaming invoke, obsoleting old invoke methods,
and updating samples

### Description

<!-- Describe your changes, the overall approach, the underlying design.
These notes will help understanding how your code works. Thanks! -->

### Contribution Checklist

<!-- Before submitting this PR, please make sure: -->

- [ ] The code builds clean without any errors or warnings
- [ ] The PR follows the [SK Contribution
Guidelines](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md)
and the [pre-submission formatting
script](https://github.com/microsoft/semantic-kernel/blob/main/CONTRIBUTING.md#development-scripts)
raises no violations
- [ ] All unit tests pass, and I have added new tests where possible
- [ ] I didn't break anyone 😄

---------

Co-authored-by: Ben Thomas <bentho@microsoft.com>

Author: alliscode

dotnet/samples/GettingStartedWithAgents/BedrockAgent/Step04_BedrockAgent_Trace.cs

@@ -3,7 +3,9 @@
 using System.ComponentModel;
 using Amazon.BedrockAgentRuntime.Model;
 using Microsoft.SemanticKernel;
+using Microsoft.SemanticKernel.Agents;
 using Microsoft.SemanticKernel.Agents.Bedrock;
+using Microsoft.SemanticKernel.ChatCompletion;
 
 namespace GettingStarted.BedrockAgents;
 
@@ -27,19 +29,14 @@ public async Task UseAgentWithTraceAsync()
         var userQuery = "What is the current weather in Seattle and what is the weather forecast in Seattle?";
         try
         {
-            // Customize the request for advanced scenarios
-            InvokeAgentRequest invokeAgentRequest = new()
+            AgentThread agentThread = new BedrockAgentThread(this.RuntimeClient);
+            BedrockAgentInvokeOptions options = new()
             {
-                AgentAliasId = BedrockAgent.WorkingDraftAgentAlias,
-                AgentId = bedrockAgent.Id,
-                SessionId = BedrockAgent.CreateSessionId(),
-                InputText = userQuery,
-                // Enable trace to inspect the agent's thought process
                 EnableTrace = true,
             };
 
-            var responses = bedrockAgent.InvokeAsync(invokeAgentRequest, null);
-            await foreach (var response in responses)
+            var responses = bedrockAgent.InvokeAsync([new ChatMessageContent(AuthorRole.User, userQuery)], agentThread, options);
+            await foreach (ChatMessageContent response in responses)
             {
                 if (response.Content != null)
                 {

dotnet/samples/GettingStartedWithAgents/BedrockAgent/Step05_BedrockAgent_FileSearch.cs

@@ -1,7 +1,9 @@
 // Copyright (c) Microsoft. All rights reserved.
 
-using Amazon.BedrockAgentRuntime.Model;
+using Microsoft.SemanticKernel;
+using Microsoft.SemanticKernel.Agents;
 using Microsoft.SemanticKernel.Agents.Bedrock;
+using Microsoft.SemanticKernel.ChatCompletion;
 
 namespace GettingStarted.BedrockAgents;
 
@@ -48,17 +50,9 @@ public async Task UseAgentWithFileSearchAsync()
         var userQuery = "What is Semantic Kernel?";
         try
         {
-            // Customize the request for advanced scenarios
-            InvokeAgentRequest invokeAgentRequest = new()
-            {
-                AgentAliasId = BedrockAgent.WorkingDraftAgentAlias,
-                AgentId = bedrockAgent.Id,
-                SessionId = BedrockAgent.CreateSessionId(),
-                InputText = userQuery,
-            };
-
-            var responses = bedrockAgent.InvokeAsync(invokeAgentRequest, null, CancellationToken.None);
-            await foreach (var response in responses)
+            AgentThread bedrockThread = new BedrockAgentThread(this.RuntimeClient);
+            var responses = bedrockAgent.InvokeAsync(new ChatMessageContent(AuthorRole.User, userQuery), bedrockThread, null, CancellationToken.None);
+            await foreach (ChatMessageContent response in responses)
             {
                 if (response.Content != null)
                 {

dotnet/samples/GettingStartedWithProcesses/Step03/ProcessesStates/FishSandwichStateProcessSuccess.json

@@ -1,55 +1,54 @@
 {
-  "$type": "Process",
   "stepsState": {
     "FriedFishWithStatefulStepsProcess": {
       "$type": "Process",
       "stepsState": {
         "GatherFriedFishIngredientsWithStockStep": {
           "$type": "Step",
-          "id": "2908f8c88cf0476a8e0075c3a8020d5d",
+          "id": "7d4c02d000a744f490f2b5f9bad721fb",
           "name": "GatherFriedFishIngredientsWithStockStep",
           "versionInfo": "GatherFishIngredient.V2",
           "state": {
-            "IngredientsStock": 3
+            "IngredientsStock": 2
           }
         },
         "CutFoodStep": {
           "$type": "Step",
-          "id": "014388cf0bbd41119b8730dfc4b0b459",
+          "id": "f147010a57d34587a3dc1ed4677e5163",
           "name": "CutFoodStep",
           "versionInfo": "CutFoodStep.V1"
         },
         "FryFoodStep": {
           "$type": "Step",
-          "id": "c55af0425d864c4e97b6ae67bd715480",
+          "id": "78cc5af4106549afb74d7a6813016f87",
           "name": "FryFoodStep",
           "versionInfo": "FryFoodStep.V1"
         }
       },
-      "id": "cab89a17aeae4b9a97568967dbf1ea47",
+      "id": "282717158b9f49e5b1acce81429610e0",
       "name": "FriedFishWithStatefulStepsProcess",
       "versionInfo": "FriedFishProcess.v1"
     },
     "AddBunsStep": {
       "$type": "Step",
-      "id": "35d09b83dea24ddf8e0c24fbe6a3746c",
+      "id": "31e953154e574470911d168a39588ed8",
       "name": "AddBunsStep",
       "versionInfo": "v1"
     },
     "AddSpecialSauceStep": {
       "$type": "Step",
-      "id": "aa0d408976574afea94387e3da7ca111",
+      "id": "67ee29ff28e4446d8046417675ec21e8",
       "name": "AddSpecialSauceStep",
       "versionInfo": "v1"
     },
     "ExternalFriedFishStep": {
       "$type": "Step",
-      "id": "2eda38b8ee8745a4ab8b21f4fa01d173",
+      "id": "873b1c8dee45412e975a5e8db2ed0b43",
       "name": "ExternalFriedFishStep",
       "versionInfo": "v1"
     }
   },
-  "id": "973b06f1-a522-4d2d-9e1c-ec45a07e275c",
+  "id": "af40089f-e57b-46d1-a15b-40c0d7f3800f",
   "name": "FishSandwichWithStatefulStepsProcess",
   "versionInfo": "FishSandwich.V1"
 }

dotnet/samples/GettingStartedWithProcesses/Step03/ProcessesStates/FriedFishProcessStateSuccess.json

@@ -1,29 +1,28 @@
 {
-  "$type": "Process",
   "stepsState": {
     "GatherFriedFishIngredientsWithStockStep": {
       "$type": "Step",
-      "id": "92a4cda38c7248648b0aa7ffaaa57f21",
+      "id": "77c2f967cd354e66a51828e9755d2f07",
       "name": "GatherFriedFishIngredientsWithStockStep",
       "versionInfo": "GatherFishIngredient.V2",
       "state": {
-        "IngredientsStock": 3
+        "IngredientsStock": 4
       }
     },
     "CutFoodStep": {
       "$type": "Step",
-      "id": "7ace89e38e1c48b0b3a700b40d160c68",
+      "id": "9276d03e64c44a6792d5fd81bd0dc143",
       "name": "CutFoodStep",
       "versionInfo": "CutFoodStep.V1"
     },
     "FryFoodStep": {
       "$type": "Step",
-      "id": "09bc39ba6d9745439c7c792b8dac0af7",
+      "id": "af2a00be4fe2408181ab5654318ed56b",
       "name": "FryFoodStep",
       "versionInfo": "FryFoodStep.V1"
     }
   },
-  "id": "669c5850-9efc-4585-b3f0-9291a4471887",
+  "id": "2050a24b-3e9d-418a-8413-74cadf4f6b4c",
   "name": "FriedFishWithStatefulStepsProcess",
   "versionInfo": "FriedFishProcess.v1"
 }

dotnet/src/Agents/Abstractions/AgentInvokeOptions.cs

@@ -5,7 +5,7 @@ namespace Microsoft.SemanticKernel.Agents;
 /// <summary>
 /// Optional parameters for agent invocation.
 /// </summary>
-public sealed class AgentInvokeOptions
+public class AgentInvokeOptions
 {
     /// <summary>
     /// Gets or sets optional arguments to pass to the agent's invocation, including any <see cref="PromptExecutionSettings"/>