diff --git a/README.md b/README.md
index 6970ae0..f80719b 100644
--- a/README.md
+++ b/README.md
@@ -33,6 +33,7 @@ Default configuration:
     c = "// %s",
     cpp = "// %s",
     css = "/* %s */",
+    c_sharp = "// %s",
     gleam = "// %s",
     glimmer = "{{! %s }}",
     graphql = "# %s",
diff --git a/lua/ts-comments.lua b/lua/ts-comments.lua
index 6603625..040b716 100644
--- a/lua/ts-comments.lua
+++ b/lua/ts-comments.lua
@@ -7,6 +7,7 @@ local defaults = {
     c = "// %s",
     cpp = "// %s",
     css = "/* %s */",
+    c_sharp = "// %s",
     gleam = "// %s",
     glimmer = "{{! %s }}",
     graphql = "# %s",