diff --git a/config/redirects b/config/redirects
index 36659d29..21ca6473 100644
--- a/config/redirects
+++ b/config/redirects
@@ -1,6 +1,6 @@
 define: prefix docs/drivers/csharp
 define: base https://www.mongodb.com/${prefix}
-define: versions v2.19 v2.20 v2.21 v2.22 v2.23 v2.24 v2.25 v2.26 v2.27 v2.28 v2.29 v2.30 v3.0 master
+define: versions v2.19 v2.20 v2.21 v2.22 v2.23 v2.24 v2.25 v2.26 v2.27 v2.28 v2.29 v2.30 v3.0 v3.1 master
 
 symlink: current -> master
 
diff --git a/snooty.toml b/snooty.toml
index 10edd3c6..04044663 100644
--- a/snooty.toml
+++ b/snooty.toml
@@ -32,7 +32,7 @@ mdb-server = "MongoDB Server"
 mongo-community = "MongoDB Community Edition"
 mongo-enterprise = "MongoDB Enterprise Edition"
 docs-branch = "master"                                                                                          # always set this to the docs branch (i.e. master, 1.7, 1.8, etc.)
-version-number = "3.0"
+version-number = "3.1"
 last-version-2-number = "2.30"
 version = "v{+version-number+}"
 example = "https://raw.githubusercontent.com/mongodb/docs-csharp/{+docs-branch+}/source/includes/code-examples"
diff --git a/source/includes/language-compatibility-table-csharp.rst b/source/includes/language-compatibility-table-csharp.rst
index ea72ea6e..9871f85f 100644
--- a/source/includes/language-compatibility-table-csharp.rst
+++ b/source/includes/language-compatibility-table-csharp.rst
@@ -14,7 +14,7 @@
      - .NET Core 3.X
      - .NET Core 2.X
 
-   * - 3.0
+   * - 3.0 to 3.1
      - ✓
      - ✓
      - ✓
@@ -45,7 +45,7 @@
      - .NET 4.7 [#2.14-note]_
      - .NET 4.6
 
-   * - 3.0
+   * - 3.0 to 3.1
      - ✓
      - ✓
      - 
diff --git a/source/includes/mongodb-compatibility-table-csharp.rst b/source/includes/mongodb-compatibility-table-csharp.rst
index 9bbbe4a2..7aea9edc 100644
--- a/source/includes/mongodb-compatibility-table-csharp.rst
+++ b/source/includes/mongodb-compatibility-table-csharp.rst
@@ -17,7 +17,7 @@
      - MongoDB 3.0
      - MongoDB 2.6
    
-   * - 3.0
+   * - 3.0 to 3.1
      - ✓
      - ✓
      - ✓
diff --git a/source/whats-new.txt b/source/whats-new.txt
index 0035138e..d7009d26 100644
--- a/source/whats-new.txt
+++ b/source/whats-new.txt
@@ -45,6 +45,27 @@ The 3.1 driver release includes the following new features:
   namespace. The driver can now serialize ``ImmutableArray`` objects, and serialization
   for other immutable collections is more memory efficient.
 
+- Adds support for the token field type and array field expressions with Atlas Search
+  builders for the ``equals`` operator. To learn more about using Atlas Search with the
+  {+driver-short+}, see :ref:`csharp-atlas-search`.
+
+- Adds support for sequential pagination in Atlas Search.
+
+- Adds support for valid SRV hostnames with fewer than 3 parts.
+
+- Adds support for the ``Exists``, ``IsMissing``, and ``IsNullOrMissing`` methods
+  in MongoDB Query API filters.
+
+- Adds support for Exact Nearest Neighbor (ENN) vector search. To learn more about ENN
+  Vector Search, see :atlas:`Run Vector Search Queries </atlas-vector-search/vector-search-stage>`
+  in the Atlas Search documentation.
+
+- Adds support for the ``sort`` option to be passed to update commands. To learn more about
+  using update commands with the {+driver-short+}, see :ref:`csharp-change-guide`.
+
+For more information about this release, see the :github:`v3.1 release notes
+</mongodb/mongo-csharp-driver/releases/tag/v3.1.0>`.
+
 .. _csharp-version-3.0:
 
 What's New in 3.0