diff --git a/src/MongoDB.Driver/Search/SearchHighlight.cs b/src/MongoDB.Driver/Search/SearchHighlight.cs
index d4790e3699e..204584359a0 100644
--- a/src/MongoDB.Driver/Search/SearchHighlight.cs
+++ b/src/MongoDB.Driver/Search/SearchHighlight.cs
@@ -24,23 +24,37 @@ namespace MongoDB.Driver.Search
     public sealed class SearchHighlight
     {
         /// <summary>
-        /// Gets or sets the document field which returned a match.
+        /// Initializes a new instance of the <see cref="SearchHighlight"/> class.
         /// </summary>
-        [BsonElement("path")]
-        public string Path { get; private set; }
+        /// <param name="path">document field which returned a match.</param>
+        /// <param name="score">Score assigned to this result.</param>
+        /// <param name="texts">Objects containing the matching text and the surrounding text.</param>
+        public SearchHighlight(string path, double score, SearchHighlightText[] texts)
+        {
+            Path = path;
+            Score = score;
+            Texts = texts;
+        }
 
         /// <summary>
-        /// Gets or sets one or more objects containing the matching text and the surrounding text
-        /// (if any).
+        /// Gets the document field which returned a match.
         /// </summary>
-        [BsonElement("texts")]
-        public SearchHighlightText[] Texts { get; private set; }
+        [BsonElement("path")]
+        public string Path { get; }
 
         /// <summary>
-        /// Gets or sets the score assigned to this result.
+        /// Gets the score assigned to this result.
         /// </summary>
         [BsonElement("score")]
-        public double Score { get; private set; }
+        public double Score { get; }
+
+        /// <summary>
+        /// Gets one or more objects containing the matching text and the surrounding text
+        /// (if any).
+        /// </summary>
+        [BsonDefaultValue(null)]
+        [BsonElement("texts")]
+        public SearchHighlightText[] Texts { get; }
     }
 
     /// <summary>
@@ -49,17 +63,28 @@ public sealed class SearchHighlight
     public sealed class SearchHighlightText
     {
         /// <summary>
-        /// Gets or sets the text from the field which returned a match.
+        /// Initializes a new instance of the <see cref="SearchHighlightText"/> class.
         /// </summary>
-        [BsonElement("value")]
-        public string Value { get; private set; }
+        /// <param name="type">Type of search highlight.</param>
+        /// <param name="value">Text from the field which returned a match.</param>
+        public SearchHighlightText(HighlightTextType type, string value)
+        {
+            Type = type;
+            Value = value;
+        }
 
         /// <summary>
         /// Gets or sets the type of text, matching or surrounding.
         /// </summary>
         [BsonElement("type")]
         [BsonRepresentation(BsonType.String)]
-        public HighlightTextType Type { get; private set; }
+        public HighlightTextType Type { get; }
+
+        /// <summary>
+        /// Gets the text from the field which returned a match.
+        /// </summary>
+        [BsonElement("value")]
+        public string Value { get; }
     }
 
     /// <summary>
diff --git a/src/MongoDB.Driver/Search/SearchMetaResult.cs b/src/MongoDB.Driver/Search/SearchMetaResult.cs
index 3c150654aec..7f57dc35123 100644
--- a/src/MongoDB.Driver/Search/SearchMetaResult.cs
+++ b/src/MongoDB.Driver/Search/SearchMetaResult.cs
@@ -25,16 +25,29 @@ namespace MongoDB.Driver.Search
     public sealed class SearchMetaCountResult
     {
         /// <summary>
-        /// Gets or sets the lower bound for this result set.
+        /// Initializes a new instance of the <see cref="SearchMetaCountResult"/> class.
         /// </summary>
+        /// <param name="lowerBound">Lower bound for this result set.</param>
+        /// <param name="total">Total for this result set.</param>
+        public SearchMetaCountResult(long? lowerBound, long? total)
+        {
+            LowerBound = lowerBound;
+            Total = total;
+        }
+
+        /// <summary>
+        /// Gets the lower bound for this result set.
+        /// </summary>
+        [BsonDefaultValue(null)]
         [BsonElement("lowerBound")]
-        public long? LowerBound { get; private set; }
+        public long? LowerBound { get; }
 
         /// <summary>
-        /// Gets or sets the total for this result set.
+        /// Gets the total for this result set.
         /// </summary>
+        [BsonDefaultValue(null)]
         [BsonElement("total")]
-        public long? Total { get; private set; }
+        public long? Total { get; }
     }
 
     /// <summary>
@@ -43,16 +56,27 @@ public sealed class SearchMetaCountResult
     public sealed class SearchMetaFacetBucketResult
     {
         /// <summary>
-        /// Gets or sets the count of documents in this facet bucket.
+        /// Initializes a new instance of the <see cref="SearchMetaFacetBucketResult"/> class.
+        /// </summary>
+        /// <param name="count">count of documents in this facet bucket.</param>
+        /// <param name="id">Unique identifier that identifies this facet bucket.</param>
+        public SearchMetaFacetBucketResult(long count, BsonValue id)
+        {
+            Count = count;
+            Id = id;
+        }
+
+        /// <summary>
+        /// Gets the count of documents in this facet bucket.
         /// </summary>
         [BsonElement("count")]
-        public long Count { get; private set; }
+        public long Count { get; }
 
         /// <summary>
-        /// Gets or sets the unique identifier that identifies this facet bucket.
+        /// Gets the unique identifier that identifies this facet bucket.
         /// </summary>
         [BsonId]
-        public BsonValue Id { get; private set; }
+        public BsonValue Id { get; }
     }
 
     /// <summary>
@@ -61,10 +85,19 @@ public sealed class SearchMetaFacetBucketResult
     public sealed class SearchMetaFacetResult
     {
         /// <summary>
-        /// Gets or sets a list of bucket result sets.
+        /// Initializes a new instance of the <see cref="SearchMetaFacetResult"/> class.
+        /// </summary>
+        /// <param name="buckets">An array of bucket result sets.</param>
+        public SearchMetaFacetResult(SearchMetaFacetBucketResult[] buckets)
+        {
+            Buckets = buckets;
+        }
+
+        /// <summary>
+        /// Gets an array of bucket result sets.
         /// </summary>
         [BsonElement("buckets")]
-        public List<SearchMetaFacetBucketResult> Buckets { get; private set; }
+        public SearchMetaFacetBucketResult[] Buckets { get; }
     }
 
     /// <summary>
@@ -73,15 +106,28 @@ public sealed class SearchMetaFacetResult
     public sealed class SearchMetaResult
     {
         /// <summary>
-        /// Gets or sets the count result set.
+        /// Initializes a new instance of the <see cref="SearchMetaResult"/> class.
+        /// </summary>
+        /// <param name="count">Count result set.</param>
+        /// <param name="facet">Facet result sets.</param>
+        public SearchMetaResult(SearchMetaCountResult count, IReadOnlyDictionary<string, SearchMetaFacetResult> facet)
+        {
+            Count = count;
+            Facet = facet;
+        }
+
+        /// <summary>
+        /// Gets the count result set.
         /// </summary>
+        [BsonDefaultValue(null)]
         [BsonElement("count")]
-        public SearchMetaCountResult Count { get; private set; }
+        public SearchMetaCountResult Count { get; }
 
         /// <summary>
-        /// Gets or sets the facet result sets.
+        /// Gets the facet result sets.
         /// </summary>
+        [BsonDefaultValue(null)]
         [BsonElement("facet")]
-        public Dictionary<string, SearchMetaFacetResult> Facet { get; private set; }
+        public IReadOnlyDictionary<string, SearchMetaFacetResult> Facet { get; }
     }
 }
diff --git a/tests/MongoDB.Driver.Tests/Search/AtlasSearchTests.cs b/tests/MongoDB.Driver.Tests/Search/AtlasSearchTests.cs
index 7b284ae8bbc..dbfb795ef7f 100644
--- a/tests/MongoDB.Driver.Tests/Search/AtlasSearchTests.cs
+++ b/tests/MongoDB.Driver.Tests/Search/AtlasSearchTests.cs
@@ -370,7 +370,6 @@ public void SearchMeta_facet()
                 .Single();
 
             result.Should().NotBeNull();
-            result.Facet.Should().NotBeNull().And.ContainKeys("date", "number", "string");
 
             var bucket = result.Facet["string"].Buckets.Should().NotBeNull().And.ContainSingle().Subject;
             bucket.Id.Should().Be((BsonString)"machine");