diff --git a/src/Mscc.GenerativeAI/Enums/DynamicRetrievalConfigMode.cs b/src/Mscc.GenerativeAI/Enums/DynamicRetrievalConfigMode.cs
new file mode 100644
index 0000000..efcf6b1
--- /dev/null
+++ b/src/Mscc.GenerativeAI/Enums/DynamicRetrievalConfigMode.cs
@@ -0,0 +1,22 @@
+#if NET472_OR_GREATER || NETSTANDARD2_0
+using System.Text.Json.Serialization;
+#endif
+
+namespace Mscc.GenerativeAI
+{
+    /// <summary>
+    /// The mode of the predictor to be used in dynamic retrieval.
+    /// </summary>
+    [JsonConverter(typeof(JsonStringEnumConverter<DynamicRetrievalConfigMode>))]
+    public enum DynamicRetrievalConfigMode
+    {
+        /// <summary>
+        /// Always trigger retrieval.
+        /// </summary>
+        ModeUnspecified = 0,
+        /// <summary>
+        /// Run retrieval only when system decides it is necessary.
+        /// </summary>
+        ModeDynamic
+    }
+}
\ No newline at end of file
diff --git a/src/Mscc.GenerativeAI/Types/Generative/Candidate.cs b/src/Mscc.GenerativeAI/Types/Generative/Candidate.cs
index 9f92315..9bacb38 100644
--- a/src/Mscc.GenerativeAI/Types/Generative/Candidate.cs
+++ b/src/Mscc.GenerativeAI/Types/Generative/Candidate.cs
@@ -1,4 +1,6 @@
-using System.Collections.Generic;
+#if NET472_OR_GREATER || NETSTANDARD2_0
+using System.Collections.Generic;
+#endif
 
 namespace Mscc.GenerativeAI
 {
diff --git a/src/Mscc.GenerativeAI/Types/Generative/DynamicRetrievalConfig.cs b/src/Mscc.GenerativeAI/Types/Generative/DynamicRetrievalConfig.cs
new file mode 100644
index 0000000..ffc590c
--- /dev/null
+++ b/src/Mscc.GenerativeAI/Types/Generative/DynamicRetrievalConfig.cs
@@ -0,0 +1,17 @@
+namespace Mscc.GenerativeAI
+{
+    /// <summary>
+    /// Describes the options to customize dynamic retrieval.
+    /// </summary>
+    public class DynamicRetrievalConfig
+    {
+        /// <summary>
+        /// The mode of the predictor to be used in dynamic retrieval.
+        /// </summary>
+        public DynamicRetrievalConfigMode? Mode { get; set; }
+        /// <summary>
+        /// The threshold to be used in dynamic retrieval. If not set, a system default value is used.
+        /// </summary>
+        public float? DynamicThreshold { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/src/Mscc.GenerativeAI/Types/Generative/GoogleSearchRetrieval.cs b/src/Mscc.GenerativeAI/Types/Generative/GoogleSearchRetrieval.cs
index b810c9f..f69b717 100644
--- a/src/Mscc.GenerativeAI/Types/Generative/GoogleSearchRetrieval.cs
+++ b/src/Mscc.GenerativeAI/Types/Generative/GoogleSearchRetrieval.cs
@@ -5,10 +5,33 @@ namespace Mscc.GenerativeAI
     /// </summary>
     public class GoogleSearchRetrieval
     {
+        /// <summary>
+        /// Specifies the dynamic retrieval configuration for the given source.
+        /// </summary>
+        public DynamicRetrievalConfig? DynamicRetrievalConfig { get; set; }
         /// <summary>
         /// Optional. Disable using the result from this tool in detecting grounding attribution.
         /// </summary>
         /// <remarks>This does not affect how the result is given to the model for generation.</remarks>
         public bool? DisableAttribution { get; set; }
+
+        /// <summary>
+        /// Creates an instance of <see cref="GoogleSearchRetrieval"/>
+        /// </summary>
+        public GoogleSearchRetrieval() { }
+        
+        /// <summary>
+        /// Creates an instance of <see cref="GoogleSearchRetrieval"/> with Mode and DynamicThreshold.
+        /// </summary>
+        /// <param name="mode">The mode of the predictor to be used in dynamic retrieval.</param>
+        /// <param name="dynamicThreshold">The threshold to be used in dynamic retrieval. If not set, a system default value is used.</param>
+        public GoogleSearchRetrieval(DynamicRetrievalConfigMode mode, float dynamicThreshold)
+        {
+            DynamicRetrievalConfig = new DynamicRetrievalConfig
+            {
+                Mode = mode, 
+                DynamicThreshold = dynamicThreshold
+            };
+        }
     }
 }
\ No newline at end of file
diff --git a/src/Mscc.GenerativeAI/Types/Generative/GroundingChunk.cs b/src/Mscc.GenerativeAI/Types/Generative/GroundingChunk.cs
new file mode 100644
index 0000000..5e488b3
--- /dev/null
+++ b/src/Mscc.GenerativeAI/Types/Generative/GroundingChunk.cs
@@ -0,0 +1,13 @@
+namespace Mscc.GenerativeAI
+{
+    /// <summary>
+    /// Grounding chunk.
+    /// </summary>
+    public class GroundingChunk
+    {
+        /// <summary>
+        /// Grounding chunk from the web.
+        /// </summary>
+        public Web? Web { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/src/Mscc.GenerativeAI/Types/Generative/GroundingMetadata.cs b/src/Mscc.GenerativeAI/Types/Generative/GroundingMetadata.cs
index 985a308..2e4102f 100644
--- a/src/Mscc.GenerativeAI/Types/Generative/GroundingMetadata.cs
+++ b/src/Mscc.GenerativeAI/Types/Generative/GroundingMetadata.cs
@@ -1,10 +1,37 @@
-using System.Collections.Generic;
+#if NET472_OR_GREATER || NETSTANDARD2_0
+using System.Collections.Generic;
+#endif
 
 namespace Mscc.GenerativeAI
 {
+    /// <summary>
+    /// Metadata returned to client when grounding is enabled.
+    /// </summary>
     public class GroundingMetadata
     {
+        /// <summary>
+        /// Optional. Google search entry for the following-up web searches.
+        /// </summary>
+        public SearchEntryPoint? SearchEntryPoint { get; set; }
+        /// <summary>
+        /// 
+        /// </summary>
         public List<GroundingAttribution>? GroundingAttributions { get; set; }
+        /// <summary>
+        /// Web search queries for the following-up web search.
+        /// </summary>
         public List<string>? WebSearchQueries { get; set; }
+        /// <summary>
+        /// List of grounding support.
+        /// </summary>
+        public List<GroundingSupport>? GroundingSupports { get; set; }
+        /// <summary>
+        /// Metadata related to retrieval in the grounding flow.
+        /// </summary>
+        public RetrievalMetadata? RetrievalMetadata { get; set; }
+        /// <summary>
+        /// List of supporting references retrieved from specified grounding source.
+        /// </summary>
+        public List<GroundingChunk>? GroundingChunks { get; set; }
     }
 }
\ No newline at end of file
diff --git a/src/Mscc.GenerativeAI/Types/Generative/GroundingSupport.cs b/src/Mscc.GenerativeAI/Types/Generative/GroundingSupport.cs
new file mode 100644
index 0000000..0221c44
--- /dev/null
+++ b/src/Mscc.GenerativeAI/Types/Generative/GroundingSupport.cs
@@ -0,0 +1,29 @@
+#if NET472_OR_GREATER || NETSTANDARD2_0
+using System.Collections.Generic;
+#endif
+
+namespace Mscc.GenerativeAI
+{
+    /// <summary>
+    /// Grounding support.
+    /// </summary>
+    public class GroundingSupport
+    {
+        /// <summary>
+        /// Segment of the content this support belongs to.
+        /// </summary>
+        public Segment? Segment { get; set; }
+        /// <summary>
+        /// A list of indices (into 'grounding_chunk') specifying the citations associated with the claim.
+        /// </summary>
+        /// <remarks>
+        /// For instance [1,3,4] means that grounding_chunk[1], grounding_chunk[3], grounding_chunk[4] are the retrieved content attributed to the claim.
+        /// </remarks>
+        public List<int>? GroundingChunkIndices { get; set; }
+        /// <summary>
+        /// Confidence score of the support references. Ranges from 0 to 1. 1 is the most confident.
+        /// This list must have the same size as the grounding_chunk_indices.
+        /// </summary>
+        public List<float>? ConfidenceScores { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/src/Mscc.GenerativeAI/Types/Generative/RetrievalMetadata.cs b/src/Mscc.GenerativeAI/Types/Generative/RetrievalMetadata.cs
new file mode 100644
index 0000000..6176b6b
--- /dev/null
+++ b/src/Mscc.GenerativeAI/Types/Generative/RetrievalMetadata.cs
@@ -0,0 +1,18 @@
+namespace Mscc.GenerativeAI
+{
+    /// <summary>
+    /// Metadata related to retrieval in the grounding flow.
+    /// </summary>
+    public class RetrievalMetadata
+    {
+        /// <summary>
+        /// Optional. Score indicating how likely information from google search could help answer the prompt. 
+        /// </summary>
+        /// <remarks>
+        /// The score is in the range [0, 1], where 0 is the least likely and 1 is the most likely.
+        /// This score is only populated when google search grounding and dynamic retrieval is enabled.
+        /// It will be compared to the threshold to determine whether to trigger google search.
+        /// </remarks>
+        public float? GoogleSearchDynamicRetrievalScore { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/src/Mscc.GenerativeAI/Types/Generative/SearchEntryPoint.cs b/src/Mscc.GenerativeAI/Types/Generative/SearchEntryPoint.cs
new file mode 100644
index 0000000..e6e7217
--- /dev/null
+++ b/src/Mscc.GenerativeAI/Types/Generative/SearchEntryPoint.cs
@@ -0,0 +1,17 @@
+namespace Mscc.GenerativeAI
+{
+    /// <summary>
+    /// Google search entry point.
+    /// </summary>
+    public class SearchEntryPoint
+    {
+        /// <summary>
+        /// Optional. Web content snippet that can be embedded in a web page or an app webview.
+        /// </summary>
+        public string? RenderedContent { get; set; }
+        /// <summary>
+        /// Optional. Base64 encoded JSON representing array of tuple.
+        /// </summary>
+        public byte[]? SdkBlob { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/src/Mscc.GenerativeAI/Types/Generative/Segment.cs b/src/Mscc.GenerativeAI/Types/Generative/Segment.cs
new file mode 100644
index 0000000..a40f3ff
--- /dev/null
+++ b/src/Mscc.GenerativeAI/Types/Generative/Segment.cs
@@ -0,0 +1,25 @@
+namespace Mscc.GenerativeAI
+{
+    /// <summary>
+    /// Segment of the content.
+    /// </summary>
+    public class Segment
+    {
+        /// <summary>
+        /// Output only. The text corresponding to the segment from the response.
+        /// </summary>
+        public string? Text { get; set; }
+        /// <summary>
+        /// Output only. Start index in the given Part, measured in bytes. Offset from the start of the Part, inclusive, starting at zero.
+        /// </summary>
+        public int? StartIndex { get; set; }
+        /// <summary>
+        /// Output only. The index of a Part object within its parent Content object.
+        /// </summary>
+        public int? PartIndex { get; set; }
+        /// <summary>
+        /// Output only. End index in the given Part, measured in bytes. Offset from the start of the Part, exclusive, starting at zero.
+        /// </summary>
+        public int? EndIndex { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/src/Mscc.GenerativeAI/Types/Generative/Web.cs b/src/Mscc.GenerativeAI/Types/Generative/Web.cs
new file mode 100644
index 0000000..7cba083
--- /dev/null
+++ b/src/Mscc.GenerativeAI/Types/Generative/Web.cs
@@ -0,0 +1,17 @@
+namespace Mscc.GenerativeAI
+{
+    /// <summary>
+    /// Chunk from the web.
+    /// </summary>
+    public class Web
+    {
+        /// <summary>
+        /// URI reference of the chunk.
+        /// </summary>
+        public string? Uri { get; set; }
+        /// <summary>
+        /// Title of the chunk.
+        /// </summary>
+        public string? Title { get; set; }
+    }
+}
\ No newline at end of file
diff --git a/tests/Mscc.GenerativeAI/GoogleAi_GeminiPro_Should.cs b/tests/Mscc.GenerativeAI/GoogleAi_GeminiPro_Should.cs
index fc17648..7429d0c 100644
--- a/tests/Mscc.GenerativeAI/GoogleAi_GeminiPro_Should.cs
+++ b/tests/Mscc.GenerativeAI/GoogleAi_GeminiPro_Should.cs
@@ -771,7 +771,7 @@ public async Task Start_Chat_Streaming()
 
         [Fact]
         // Ref: https://ai.google.dev/api/generate-content#code-execution
-        public async Task Code_Execution()
+        public async Task Generate_Content_Code_Execution()
         {
             // Arrange
             var prompt = "What is the sum of the first 50 prime numbers?";
@@ -791,6 +791,72 @@ public async Task Code_Execution()
 //                    .Where(t => !string.IsNullOrEmpty(t))
                     .ToArray()));
         }
+
+        [Fact]
+        // Ref: https://ai.google.dev/gemini-api/docs/grounding
+        public async Task Generate_Content_Grounding_Search()
+        {
+            // Arrange
+            var prompt = "Who won Wimbledon this year?";
+            var genAi = new GoogleAI(_fixture.ApiKey);
+            var model = genAi.GenerativeModel("gemini-1.5-pro-002",
+                tools: [new Tool { GoogleSearchRetrieval = new() }]);
+
+            // Act
+            var response = await model.GenerateContent(prompt);
+
+            // Assert
+            response.Should().NotBeNull();
+            response.Candidates.Should().NotBeNull().And.HaveCount(1);
+            response.Candidates![0].GroundingMetadata.Should().NotBeNull();
+            response.Candidates![0].GroundingMetadata!.SearchEntryPoint.Should().NotBeNull();
+            response.Candidates![0].GroundingMetadata!.WebSearchQueries.Should().NotBeNull();
+            _output.WriteLine(string.Join(Environment.NewLine,
+                response.Candidates![0].Content!.Parts
+                    .Select(x => x.Text)
+//                    .Where(t => !string.IsNullOrEmpty(t))
+                    .ToArray()));
+            response.Candidates![0].GroundingMetadata!.GroundingChunks!
+                .ForEach(c => 
+                    _output.WriteLine($"{c!.Web!.Title} - {c!.Web!.Uri}"));
+            _output.WriteLine(string.Join(Environment.NewLine,
+                response.Candidates![0].GroundingMetadata!.WebSearchQueries!
+                    .Select(w => w)
+                    .ToArray()));
+            _output.WriteLine(response.Candidates![0].GroundingMetadata!.SearchEntryPoint!.RenderedContent);
+        }
+
+        [Fact]
+        // Ref: https://ai.google.dev/gemini-api/docs/grounding
+        public async Task Generate_Content_Grounding_Search_Dictionary()
+        {
+            // Arrange
+            var prompt = "Who won Wimbledon this year?";
+            var genAi = new GoogleAI(_fixture.ApiKey);
+            var model = genAi.GenerativeModel("gemini-1.5-pro-002",
+                tools: [new Tool { GoogleSearchRetrieval = 
+                    new(DynamicRetrievalConfigMode.ModeUnspecified, 0.06f) }]);
+
+            // Act
+            var response = await model.GenerateContent(prompt);
+
+            // Assert
+            response.Should().NotBeNull();
+            response.Candidates.Should().NotBeNull().And.HaveCount(1);
+            _output.WriteLine(string.Join(Environment.NewLine,
+                response.Candidates![0].Content!.Parts
+                    .Select(x => x.Text)
+//                    .Where(t => !string.IsNullOrEmpty(t))
+                    .ToArray()));
+            response.Candidates![0].GroundingMetadata!.GroundingChunks!
+                .ForEach(c => 
+                    _output.WriteLine($"{c!.Web!.Title} - {c!.Web!.Uri}"));
+            _output.WriteLine(string.Join(Environment.NewLine,
+                response.Candidates![0].GroundingMetadata!.WebSearchQueries!
+                    .Select(w => w)
+                    .ToArray()));
+            _output.WriteLine(response.Candidates![0].GroundingMetadata!.SearchEntryPoint!.RenderedContent);
+        }
         
         [Fact]
         // Ref: https://ai.google.dev/docs/function_calling