diff --git a/cli/src/args.rs b/cli/src/args.rs
index 05b79619..800ad719 100644
--- a/cli/src/args.rs
+++ b/cli/src/args.rs
@@ -12,6 +12,7 @@ pub enum AvailableLanguage {
     Go,
     #[cfg(feature = "python")]
     Python,
+    CSharp,
 }
 
 #[derive(clap::Parser)]
@@ -49,6 +50,10 @@ pub struct Args {
     #[arg(long)]
     pub scala_package: Option<String>,
 
+    /// CSharp namespace
+    #[arg(long)]
+    pub csharp_namespace: Option<String>,
+
     /// Scala serializer module name
     #[arg(long)]
     pub scala_module_name: Option<String>,
diff --git a/cli/src/main.rs b/cli/src/main.rs
index ca087418..dc96d992 100644
--- a/cli/src/main.rs
+++ b/cli/src/main.rs
@@ -27,7 +27,7 @@ use typeshare_core::language::Go;
 use typeshare_core::language::Python;
 use typeshare_core::{
     context::ParseContext,
-    language::{CrateName, Kotlin, Language, Scala, SupportedLanguage, Swift, TypeScript},
+    language::{CSharp, CrateName, Kotlin, Language, Scala, SupportedLanguage, Swift, TypeScript},
     parser::ParsedData,
     reconcile::reconcile_aliases,
 };
@@ -95,6 +95,7 @@ fn generate_types(config_file: Option<&Path>, options: &Args) -> anyhow::Result<
             args::AvailableLanguage::Go => SupportedLanguage::Go,
             #[cfg(feature = "python")]
             args::AvailableLanguage::Python => SupportedLanguage::Python,
+            args::AvailableLanguage::CSharp => SupportedLanguage::CSharp,
         },
     };
 
@@ -268,7 +269,7 @@ fn override_configuration(mut config: Config, options: &Args) -> anyhow::Result<
         config.scala.module_name = scala_module_name.to_string();
     }
 
-    if let Some(csharp_namespace) = options.value_of(ARG_CSHARP_NAMESPACE) {
+    if let Some(csharp_namespace) = options.csharp_namespace.as_ref() {
         config.csharp.namespace = csharp_namespace.to_string();
     }