UseSWIG: Use standard library name conventions for csharp language

Fixes: #21542

Help/manual/cmake-policies.7.rst

@@ -57,7 +57,8 @@ Policies Introduced by CMake 3.21
 .. toctree::
    :maxdepth: 1
 
-   CMP0121: The list command detects invalid indicies </policy/CMP0121>
+   CMP0122: UseSWIG use standard library name conventions for csharp language. </policy/CMP0122>
+   CMP0121: The list command detects invalid indicies. </policy/CMP0121>
 
 Policies Introduced by CMake 3.20
 =================================

Help/policy/CMP0122.rst

@@ -0,0 +1,17 @@
+CMP0122
+-------
+
+.. versionadded:: 3.21
+
+:module:`UseSWIG` use library name conventions for ``CSharp`` language.
+
+Starting with CMake 3.21, :module:`UseSWIG` generates now a library using
+default naming conventions. This policy provides compatibility with projects
+that expect the legacy behavior.
+
+This policy was introduced in CMake version 3.21.  CMake version
+|release| warns when the policy is not set and uses ``OLD`` behavior.
+Use the :command:`cmake_policy` command to set it to ``OLD`` or ``NEW``
+explicitly.
+
+.. include:: DEPRECATED.txt

Help/release/dev/UseSWIG-csharp.rst

@@ -0,0 +1,5 @@
+UseSWIG-csharp
+--------------
+
+* The :module:`UseSWIG` module use now standard library name conventions for
+  ``CSharp`` language. See policy :policy:`CMP0122`.