feat(genai): add text generation samples (3)

genai/api/GenAI.Samples.Tests/TextGeneration/TextGenSysInstrWithTxtTest.cs

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+/*
+ * 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 System.Threading.Tasks;
+using Xunit;
+
+[Collection(nameof(GenAIFixture))]
+public class TextGenSysInstrWithTxtTest
+{
+    private readonly GenAIFixture _fixture;
+    private readonly TextGenSysInstrWithTxt _sample;
+
+    public TextGenSysInstrWithTxtTest(GenAIFixture fixture)
+    {
+        _fixture = fixture;
+        _sample = new TextGenSysInstrWithTxt();
+    }
+
+    [Fact]
+    public async Task TestTextGenSysInstrWithTxt()
+    {
+        var response = await _sample.GenerateContent(_fixture.ProjectId);
+        Assert.NotEmpty(response);
+    }
+}

genai/api/GenAI.Samples.Tests/TextGeneration/TextGenWithMuteVideoTest.cs

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+/*
+ * 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 System.Threading.Tasks;
+using Xunit;
+
+[Collection(nameof(GenAIFixture))]
+public class TextGenWithMuteVideoTest
+{
+    private readonly GenAIFixture _fixture;
+    private readonly TextGenWithMuteVideo _sample;
+
+    public TextGenWithMuteVideoTest(GenAIFixture fixture)
+    {
+        _fixture = fixture;
+        _sample = new TextGenWithMuteVideo();
+    }
+
+    [Fact]
+    public async Task TestTextGenWithMuteVideo()
+    {
+        var response = await _sample.GenerateContent(_fixture.ProjectId);
+        Assert.NotEmpty(response);
+    }
+}

genai/api/GenAI.Samples.Tests/TextGeneration/TextGenWithTxtImgTest.cs

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+/*
+ * 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 System.Threading.Tasks;
+using Xunit;
+
+[Collection(nameof(GenAIFixture))]
+public class TextGenWithTxtImgTest
+{
+    private readonly GenAIFixture _fixture;
+    private readonly TextGenWithTxtImg _sample;
+
+    public TextGenWithTxtImgTest(GenAIFixture fixture)
+    {
+        _fixture = fixture;
+        _sample = new TextGenWithTxtImg();
+    }
+
+    [Fact]
+    public async Task TestTextGenWithTxtImg()
+    {
+        var response = await _sample.GenerateContent(_fixture.ProjectId);
+        Assert.NotEmpty(response);
+    }
+}

genai/api/GenAI.Samples.Tests/TextGeneration/TextGenWithTxtStreamTest.cs

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+/*
+ * 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 System.Threading.Tasks;
+using Xunit;
+
+[Collection(nameof(GenAIFixture))]
+public class TextGenWithTxtStreamTest
+{
+    private readonly GenAIFixture _fixture;
+    private readonly TextGenWithTxtStream _sample;
+
+    public TextGenWithTxtStreamTest(GenAIFixture fixture)
+    {
+        _fixture = fixture;
+        _sample = new TextGenWithTxtStream();
+    }
+
+    [Fact]
+    public async Task TestTextGenWithTxtStream()
+    {
+        var response = await _sample.GenerateContent(_fixture.ProjectId);
+        Assert.NotEmpty(response);
+    }
+}

genai/api/GenAI.Samples/TextGeneration/TextGenSysInstrWithTxt.cs

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+/*
+ * 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.
+ */
+
+// [START googlegenaisdk_textgen_sys_instr_with_txt]
+
+using Google.GenAI;
+using Google.GenAI.Types;
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+public class TextGenSysInstrWithTxt
+{
+    public async Task<string> GenerateContent(
+        string projectId = "your-project-id",
+        string location = "global",
+        string model = "gemini-2.5-flash")
+    {
+        await using var client = new Client(
+            project: projectId,
+            location: location,
+            vertexAI: true,
+            httpOptions: new HttpOptions { ApiVersion = "v1" });
+
+        var systemInstruction = new Content
+        {
+            Parts = new List<Part>
+            {
+                new Part
+                {
+                    Text = "You're a language translator. Your mission is to translate text in English to French."
+                }
+            }
+        };
+
+        GenerateContentResponse response = await client.Models.GenerateContentAsync(
+            model: model,
+            contents: "Why is the sky blue?",
+            config: new GenerateContentConfig { SystemInstruction = systemInstruction });
+
+        string responseText = response.Candidates[0].Content.Parts[0].Text;
+        Console.WriteLine(responseText);
+        // Example response:
+        // Pourquoi le ciel est-il bleu ?
+        return responseText;
+    }
+}
+// [END googlegenaisdk_textgen_sys_instr_with_txt]

genai/api/GenAI.Samples/TextGeneration/TextGenWithMuteVideo.cs

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+/*
+ * 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.
+ */
+
+// [START googlegenaisdk_textgen_with_mute_video]
+
+using Google.GenAI;
+using Google.GenAI.Types;
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+public class TextGenWithMuteVideo
+{
+    public async Task<string> GenerateContent(
+        string projectId = "your-project-id",
+        string location = "global",
+        string model = "gemini-2.5-flash")
+    {
+        await using var client = new Client(
+            project: projectId,
+            location: location,
+            vertexAI: true,
+            httpOptions: new HttpOptions { ApiVersion = "v1" });
+
+        var contents = new List<Content>
+        {
+            new Content
+            {
+                Role = "user",
+                Parts = new List<Part>
+                {
+                    new Part
+                    {
+                        FileData = new FileData
+                        {
+                            FileUri = "gs://cloud-samples-data/generative-ai/video/ad_copy_from_video.mp4",
+                            MimeType = "video/mp4"
+                        }
+                    },
+                    new Part { Text = "What is in this video?"}
+                }
+            }
+        };
+
+        GenerateContentResponse response = await client.Models.GenerateContentAsync(
+            model: model,
+            contents: contents);
+
+        string responseText = response.Candidates[0].Content.Parts[0].Text;
+        Console.WriteLine(responseText);
+        // Example response:
+        // This video shows an aerial view of people surfing in the ocean on a misty
+        // or hazy day, with a distant coastline and mountains in the background...
+        return responseText;
+    }
+}
+// [END googlegenaisdk_textgen_with_mute_video]

genai/api/GenAI.Samples/TextGeneration/TextGenWithTxtImg.cs

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+/*
+ * 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.
+ */
+
+// [START googlegenaisdk_textgen_with_txt_img]
+
+using Google.GenAI;
+using Google.GenAI.Types;
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+public class TextGenWithTxtImg
+{
+    public async Task<string> GenerateContent(
+        string projectId = "your-project-id",
+        string location = "global",
+        string model = "gemini-2.5-flash")
+    {
+        await using var client = new Client(
+            project: projectId,
+            location: location,
+            vertexAI: true,
+            httpOptions: new HttpOptions { ApiVersion = "v1" });
+
+        var contents = new List<Content>
+        {
+            new Content
+            {
+                Role = "user",
+                Parts = new List<Part>
+                {
+                    new Part
+                    {
+                        FileData = new FileData
+                        {
+                            FileUri = "gs://cloud-samples-data/generative-ai/image/scones.jpg",
+                            MimeType = "image/jpeg"
+                        }
+                    },
+                    new Part { Text = "What is shown in this image?"}
+                }
+            }
+        };
+
+        GenerateContentResponse response = await client.Models.GenerateContentAsync(
+            model: model,
+            contents: contents);
+
+        string responseText = response.Candidates[0].Content.Parts[0].Text;
+        Console.WriteLine(responseText);
+        // Example response:
+        // This image displays a beautifully arranged, top-down still life featuring
+        // blueberry scones, fresh fruit, drinks, and flowers, set against...
+        return responseText;
+    }
+}
+// [END googlegenaisdk_textgen_with_txt_img]