googleapis · copybara-service · Apr 22, 2026
diff --git a/DemoApp/Files/packages.lock.json b/DemoApp/Files/packages.lock.json
@@ -51,7 +51,9 @@
         "dependencies": {
           "Google.Apis.Auth": "[1.69.0, )",
           "Microsoft.Extensions.AI.Abstractions": "[10.4.0, )",
-          "MimeTypes": "[2.5.2, )"
+          "MimeTypes": "[2.5.2, )",
+          "System.Collections.Immutable": "[9.0.0, )",
+          "System.Net.ServerSentEvents": "[9.0.0, )"
         }
       },
       "Google.Apis.Auth": {
@@ -80,6 +82,18 @@
         "resolved": "2.5.2",
         "contentHash": "vm4xrNt+i6OVRQ8vhfCcmDIUg3qvjyCTkSTNVTDFohsG6CXEpMaVFkidECL6yRYpHDnz4TqXhDoEQAcnHCu/tw=="
       },
+      "System.Collections.Immutable": {
+        "type": "CentralTransitive",
+        "requested": "[9.0.0, )",
+        "resolved": "9.0.0",
+        "contentHash": "QhkXUl2gNrQtvPmtBTQHb0YsUrDiDQ2QS09YbtTTiSjGcf7NBqtYbrG/BE06zcBPCKEwQGzIv13IVdXNOSub2w=="
+      },
+      "System.Net.ServerSentEvents": {
+        "type": "CentralTransitive",
+        "requested": "[9.0.0, )",
+        "resolved": "9.0.0",
+        "contentHash": "VTWjeyx9nPb4+hkjGcAaDw1nOckypMtvABmxSWm6PPYwrXoIiVG3jwtNlAGhaGVjDkBrERABox67wYTAcHxg7Q=="
+      },
       "System.Text.Json": {
         "type": "CentralTransitive",
         "requested": "[10.0.4, )",

diff --git a/DemoApp/GenerateContentSimpleText/packages.lock.json b/DemoApp/GenerateContentSimpleText/packages.lock.json
@@ -51,7 +51,9 @@
         "dependencies": {
           "Google.Apis.Auth": "[1.69.0, )",
           "Microsoft.Extensions.AI.Abstractions": "[10.4.0, )",
-          "MimeTypes": "[2.5.2, )"
+          "MimeTypes": "[2.5.2, )",
+          "System.Collections.Immutable": "[9.0.0, )",
+          "System.Net.ServerSentEvents": "[9.0.0, )"
         }
       },
       "Google.Apis.Auth": {
@@ -80,6 +82,18 @@
         "resolved": "2.5.2",
         "contentHash": "vm4xrNt+i6OVRQ8vhfCcmDIUg3qvjyCTkSTNVTDFohsG6CXEpMaVFkidECL6yRYpHDnz4TqXhDoEQAcnHCu/tw=="
       },
+      "System.Collections.Immutable": {
+        "type": "CentralTransitive",
+        "requested": "[9.0.0, )",
+        "resolved": "9.0.0",
+        "contentHash": "QhkXUl2gNrQtvPmtBTQHb0YsUrDiDQ2QS09YbtTTiSjGcf7NBqtYbrG/BE06zcBPCKEwQGzIv13IVdXNOSub2w=="
+      },
+      "System.Net.ServerSentEvents": {
+        "type": "CentralTransitive",
+        "requested": "[9.0.0, )",
+        "resolved": "9.0.0",
+        "contentHash": "VTWjeyx9nPb4+hkjGcAaDw1nOckypMtvABmxSWm6PPYwrXoIiVG3jwtNlAGhaGVjDkBrERABox67wYTAcHxg7Q=="
+      },
       "System.Text.Json": {
         "type": "CentralTransitive",
         "requested": "[10.0.4, )",

diff --git a/DemoApp/GenerateContentStreamSimpleText/packages.lock.json b/DemoApp/GenerateContentStreamSimpleText/packages.lock.json
@@ -51,7 +51,9 @@
         "dependencies": {
           "Google.Apis.Auth": "[1.69.0, )",
           "Microsoft.Extensions.AI.Abstractions": "[10.4.0, )",
-          "MimeTypes": "[2.5.2, )"
+          "MimeTypes": "[2.5.2, )",
+          "System.Collections.Immutable": "[9.0.0, )",
+          "System.Net.ServerSentEvents": "[9.0.0, )"
         }
       },
       "Google.Apis.Auth": {
@@ -80,6 +82,18 @@
         "resolved": "2.5.2",
         "contentHash": "vm4xrNt+i6OVRQ8vhfCcmDIUg3qvjyCTkSTNVTDFohsG6CXEpMaVFkidECL6yRYpHDnz4TqXhDoEQAcnHCu/tw=="
       },
+      "System.Collections.Immutable": {
+        "type": "CentralTransitive",
+        "requested": "[9.0.0, )",
+        "resolved": "9.0.0",
+        "contentHash": "QhkXUl2gNrQtvPmtBTQHb0YsUrDiDQ2QS09YbtTTiSjGcf7NBqtYbrG/BE06zcBPCKEwQGzIv13IVdXNOSub2w=="
+      },
+      "System.Net.ServerSentEvents": {
+        "type": "CentralTransitive",
+        "requested": "[9.0.0, )",
+        "resolved": "9.0.0",
+        "contentHash": "VTWjeyx9nPb4+hkjGcAaDw1nOckypMtvABmxSWm6PPYwrXoIiVG3jwtNlAGhaGVjDkBrERABox67wYTAcHxg7Q=="
+      },
       "System.Text.Json": {
         "type": "CentralTransitive",
         "requested": "[10.0.4, )",

diff --git a/DemoApp/InteractionCreate/InteractionCreate.csproj b/DemoApp/InteractionCreate/InteractionCreate.csproj
@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\Google.GenAI\Google.GenAI.csproj" />
+  </ItemGroup>
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
diff --git a/DemoApp/InteractionCreate/Program.cs b/DemoApp/InteractionCreate/Program.cs
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+using Google.GenAI;
+using Google.GenAI.Interactions.Models.Interactions;
+
+bool isVertex = args.Contains("--vertex", StringComparer.OrdinalIgnoreCase);
+Console.WriteLine(isVertex ? "Running in Vertex AI mode." : "Running in Gemini API mode.");
+
+Client client = new Client(vertexAI: isVertex);
+
+CreateModelInteractionParams parameters = new()
+{
+    Input = "What is your name?",
+    Model = Model.Gemini2_5Flash,
+};
+
+Interaction interaction = await client.Interactions.Create(new() { Body = parameters });
+
+Console.WriteLine($"Interaction ID: {interaction.ID}");
+Console.WriteLine($"Status: {interaction.Status}");
+
+foreach (var output in interaction?.Outputs ?? [])
+{
+    if (output.TryPickText(out var text))
+    {
+        Console.WriteLine($"Output: {text.Text}");
+    }
+}
diff --git a/DemoApp/InteractionCreate/README.md b/DemoApp/InteractionCreate/README.md
@@ -0,0 +1,3 @@
+1. Perform these steps when you are in the directory of this README file.
+2. Set the `GOOGLE_API_KEY` environment variable to your API key.
+3. Run `dotnet run` to run the demo
diff --git a/DemoApp/InteractionCreateStreaming/InteractionCreateStreaming.csproj b/DemoApp/InteractionCreateStreaming/InteractionCreateStreaming.csproj
@@ -0,0 +1,15 @@
+
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\Google.GenAI\Google.GenAI.csproj" />
+  </ItemGroup>
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
diff --git a/DemoApp/InteractionCreateStreaming/Program.cs b/DemoApp/InteractionCreateStreaming/Program.cs
@@ -0,0 +1,39 @@
+/*
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+using Google.GenAI;
+using Google.GenAI.Interactions.Models.Interactions;
+
+bool isVertex = args.Contains("--vertex", StringComparer.OrdinalIgnoreCase);
+Console.WriteLine(isVertex ? "Running in Vertex AI mode." : "Running in Gemini API mode.");
+
+Client client = new Client(vertexAI: isVertex);
+
+CreateModelInteractionParams parameters = new()
+{
+    Input = "Tell me a story in 300 words.",
+    Model = Model.Gemini2_5Flash,
+};
+
+await foreach (var messageEvent in client.Interactions.CreateStreaming(new() { Body = parameters }))
+{
+    if (messageEvent.TryPickContentDelta(out var contentDelta) && contentDelta.Delta.TryPickText(out var deltaText))
+    {
+        Console.Write(deltaText.TextValue);
+    }
+}
+
+Console.WriteLine();
diff --git a/DemoApp/InteractionCreateStreaming/README.md b/DemoApp/InteractionCreateStreaming/README.md
@@ -0,0 +1,3 @@
+1. Perform these steps when you are in the directory of this README file.
+2. Set the `GOOGLE_API_KEY` environment variable to your API key.
+3. Run `dotnet run` to run the demo
diff --git a/DemoApp/InteractionDeepResearch/InteractionDeepResearch.csproj b/DemoApp/InteractionDeepResearch/InteractionDeepResearch.csproj
@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\Google.GenAI\Google.GenAI.csproj" />
+  </ItemGroup>
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+</Project>
diff --git a/DemoApp/InteractionDeepResearch/Program.cs b/DemoApp/InteractionDeepResearch/Program.cs
@@ -0,0 +1,130 @@
+/*
+ * Copyright 2026 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+using Google.GenAI;
+using Google.GenAI.Interactions.Models.Interactions;
+
+namespace InteractionDeepResearch;
+
+class Program
+{
+    static async Task Main(string[] args)
+    {
+        string? vertexAIEnv = System.Environment.GetEnvironmentVariable("GOOGLE_GENAI_USE_VERTEXAI");
+        bool isVertexAI = vertexAIEnv != null && vertexAIEnv.ToLower() == "true";
+
+        if (!isVertexAI)
+        {
+            Console.Error.WriteLine("Deep Research is only supported on Vertex AI. Please set GOOGLE_GENAI_USE_VERTEXAI=true.");
+            return;
+        }
+
+        Client client = new Client(vertexAI: true);
+
+        Console.WriteLine("--- Starting Deep Research Interaction ---");
+
+        var interactions = client.Interactions.WithOptions(options =>
+        {
+            options.ApiVersion = "v1beta1";
+            return options;
+        });
+
+        CreateAgentInteractionParams agentParams = new()
+        {
+            Agent = "deep-research-pro-preview-12-2025",
+            Input = "I want to learn more about the history of Hadrian's Wall",
+            Background = true,
+        };
+
+        var createParams = new InteractionCreateParams()
+        {
+            Body = agentParams
+        };
+
+        string? interactionId = null;
+
+        Console.WriteLine("--- Sending Create Request ---");
+
+        // We use CreateStreaming to see progress events
+        await foreach (var messageEvent in interactions.CreateStreaming(createParams))
+        {
+            if (messageEvent.TryPickStart(out var startEvent))
+            {
+                interactionId = startEvent.Interaction.ID;
+                Console.WriteLine($"Started Interaction ID: {interactionId}");
+            }
+
+            if (messageEvent.TryPickStatusUpdate(out var statusUpdate))
+            {
+                Console.WriteLine($"Event: StatusUpdate - {statusUpdate.Status}");
+            }
+            else if (messageEvent.TryPickContentDelta(out var contentDelta))
+            {
+                if (contentDelta.Delta.TryPickText(out var text))
+                {
+                    Console.Write(text.TextValue);
+                }
+                else
+                {
+                    Console.WriteLine("\n[Agent Activity]");
+                }
+            }
+            else if (messageEvent.TryPickComplete(out var complete))
+            {
+                Console.WriteLine("\nEvent: Complete");
+                break;
+            }
+
+            // We only want to capture the ID from the first few events and then we can let it run in background
+            // or we can wait. The Java example limits to 1 event to capture ID and then resumes.
+            // Let's mimic Java: capture ID from start event and then break to resume.
+            if (interactionId != null)
+            {
+                break;
+            }
+        }
+
+        if (interactionId == null)
+        {
+            Console.Error.WriteLine("Failed to capture interaction ID.");
+            return;
+        }
+
+        Console.WriteLine($"\n--- Resuming Interaction: {interactionId} ---");
+
+        // Resume the stream
+        await foreach (var messageEvent in interactions.GetStreaming(interactionId))
+        {
+            if (messageEvent.TryPickStatusUpdate(out var statusUpdate))
+            {
+                Console.WriteLine($"\n[Status update: {statusUpdate.Status}]");
+            }
+            else if (messageEvent.TryPickContentDelta(out var contentDelta))
+            {
+                if (contentDelta.Delta.TryPickText(out var text))
+                {
+                    Console.Write(text.TextValue);
+                }
+                else
+                {
+                    Console.WriteLine("\n[Agent Activity]");
+                }
+            }
+        }
+
+        Console.WriteLine();
+    }
+}
diff --git a/DemoApp/JsonParser/packages.lock.json b/DemoApp/JsonParser/packages.lock.json
@@ -51,7 +51,9 @@
         "dependencies": {
           "Google.Apis.Auth": "[1.69.0, )",
           "Microsoft.Extensions.AI.Abstractions": "[10.4.0, )",
-          "MimeTypes": "[2.5.2, )"
+          "MimeTypes": "[2.5.2, )",
+          "System.Collections.Immutable": "[9.0.0, )",
+          "System.Net.ServerSentEvents": "[9.0.0, )"
         }
       },
       "Google.Apis.Auth": {
@@ -80,6 +82,18 @@
         "resolved": "2.5.2",
         "contentHash": "vm4xrNt+i6OVRQ8vhfCcmDIUg3qvjyCTkSTNVTDFohsG6CXEpMaVFkidECL6yRYpHDnz4TqXhDoEQAcnHCu/tw=="
       },
+      "System.Collections.Immutable": {
+        "type": "CentralTransitive",
+        "requested": "[9.0.0, )",
+        "resolved": "9.0.0",
+        "contentHash": "QhkXUl2gNrQtvPmtBTQHb0YsUrDiDQ2QS09YbtTTiSjGcf7NBqtYbrG/BE06zcBPCKEwQGzIv13IVdXNOSub2w=="
+      },
+      "System.Net.ServerSentEvents": {
+        "type": "CentralTransitive",
+        "requested": "[9.0.0, )",
+        "resolved": "9.0.0",
+        "contentHash": "VTWjeyx9nPb4+hkjGcAaDw1nOckypMtvABmxSWm6PPYwrXoIiVG3jwtNlAGhaGVjDkBrERABox67wYTAcHxg7Q=="
+      },
       "System.Text.Json": {
         "type": "CentralTransitive",
         "requested": "[10.0.4, )",