diff --git a/.gitattributes b/.gitattributes
index 921952f..0d49588 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -10,4 +10,16 @@
 .githooks/*    text eol=lf
 scripts/*      text eol=lf
 
+# csharpier check fails with "different line endings than formatting would
+# result in" when .cs files are CRLF. The Gitea Actions runners are Linux
+# and the local dev box is Linux too, so force LF for the entire source
+# tree and the supporting text manifests.
+*.cs           text eol=lf
+*.csproj       text eol=lf
+*.sln          text eol=lf
+*.yml          text eol=lf
+*.yaml         text eol=lf
+*.json         text eol=lf
+*.md           text eol=lf
+
 *.png binary