diff --git a/apiCount.include.md b/apiCount.include.md
index 22c0cf3..b721954 100644
--- a/apiCount.include.md
+++ b/apiCount.include.md
@@ -1 +1 @@
-**API count: 435**
\ No newline at end of file
+**API count: 437**
\ No newline at end of file
diff --git a/api_list.include.md b/api_list.include.md
index 04144c0..de41d91 100644
--- a/api_list.include.md
+++ b/api_list.include.md
@@ -331,6 +331,8 @@
  * `void CopyTo(string, Span<char>)` [reference](https://learn.microsoft.com/en-us/dotnet/api/system.string.copyto)
  * `bool EndsWith(string, char)` [reference](https://learn.microsoft.com/en-us/dotnet/api/system.string.endswith#system-string-endswith(system-char))
  * `int GetHashCode(string, StringComparison)` [reference](https://learn.microsoft.com/en-us/dotnet/api/system.string.gethashcode#system-string-gethashcode(system-stringcomparison))
+ * `string ReplaceLineEndings(string, string)` [reference](https://learn.microsoft.com/en-us/dotnet/api/system.string.replacelineendings?view=net-9.0#system-string-replacelineendings(system-string))
+ * `string ReplaceLineEndings(string)` [reference](https://learn.microsoft.com/en-us/dotnet/api/system.string.replacelineendings#system-string-replacelineendings)
  * `string[] Split(string, char, StringSplitOptions)` [reference](https://learn.microsoft.com/en-us/dotnet/api/system.string.split#system-string-split(system-char-system-stringsplitoptions))
  * `string[] Split(string, char, int, StringSplitOptions)` [reference](https://learn.microsoft.com/en-us/dotnet/api/system.string.split#system-string-split(system-char-system-int32-system-stringsplitoptions))
  * `bool StartsWith(string, char)` [reference](https://learn.microsoft.com/en-us/dotnet/api/system.string.startswith#system-string-startswith(system-char))
diff --git a/readme.md b/readme.md
index 9a22096..137612f 100644
--- a/readme.md
+++ b/readme.md
@@ -12,7 +12,7 @@ The package targets `netstandard2.0` and is designed to support the following ru
  * `net5.0`, `net6.0`, `net7.0`, `net8.0`, `net9.0`
 
 
-**API count: 435**<!-- singleLineInclude: apiCount. path: /apiCount.include.md -->
+**API count: 437**<!-- singleLineInclude: apiCount. path: /apiCount.include.md -->
 
 
 **See [Milestones](../../milestones?state=closed) for release notes.**
@@ -800,6 +800,8 @@ The class `Polyfill` includes the following extension methods:
  * `void CopyTo(string, Span<char>)` [reference](https://learn.microsoft.com/en-us/dotnet/api/system.string.copyto)
  * `bool EndsWith(string, char)` [reference](https://learn.microsoft.com/en-us/dotnet/api/system.string.endswith#system-string-endswith(system-char))
  * `int GetHashCode(string, StringComparison)` [reference](https://learn.microsoft.com/en-us/dotnet/api/system.string.gethashcode#system-string-gethashcode(system-stringcomparison))
+ * `string ReplaceLineEndings(string, string)` [reference](https://learn.microsoft.com/en-us/dotnet/api/system.string.replacelineendings?view=net-9.0#system-string-replacelineendings(system-string))
+ * `string ReplaceLineEndings(string)` [reference](https://learn.microsoft.com/en-us/dotnet/api/system.string.replacelineendings#system-string-replacelineendings)
  * `string[] Split(string, char, StringSplitOptions)` [reference](https://learn.microsoft.com/en-us/dotnet/api/system.string.split#system-string-split(system-char-system-stringsplitoptions))
  * `string[] Split(string, char, int, StringSplitOptions)` [reference](https://learn.microsoft.com/en-us/dotnet/api/system.string.split#system-string-split(system-char-system-int32-system-stringsplitoptions))
  * `bool StartsWith(string, char)` [reference](https://learn.microsoft.com/en-us/dotnet/api/system.string.startswith#system-string-startswith(system-char))