diff --git a/examples/example.jrpc b/examples/example.jrpc
index 723243c..cecfccf 100644
--- a/examples/example.jrpc
+++ b/examples/example.jrpc
@@ -1,6 +1,6 @@
 import "./import";
 
-define CSharp_Namespace Example;
+define csharp_namespace Example;
 
 enum TestEnum {
    VAL1,
diff --git a/lib/jrpc.js b/lib/jrpc.js
index 9099b16..3d284c8 100755
--- a/lib/jrpc.js
+++ b/lib/jrpc.js
@@ -10443,7 +10443,7 @@ function toCSharpType(type) {
 var CSharpTarget = class extends CompileTarget {
   name = "c#";
   get namespace() {
-    return this.options.CSharp_Namespace || "JRPC";
+    return this.options.csharp_namespace || "JRPC";
   }
   start() {
     this.writeFile(this.namespace + ".csproj", this.getTemplate("CSharp/CSharp.csproj"));
diff --git a/package.json b/package.json
index be3b473..02ffde6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
    "name": "@hibas123/jrpcgen",
-   "version": "1.0.18",
+   "version": "1.0.19",
    "main": "lib/index.js",
    "license": "MIT",
    "packageManager": "yarn@3.1.1",
diff --git a/src/targets/csharp.ts b/src/targets/csharp.ts
index 28f8505..1a44a30 100644
--- a/src/targets/csharp.ts
+++ b/src/targets/csharp.ts
@@ -21,11 +21,11 @@ function toCSharpType(type: string): string {
    return (conversion as any)[type] || type;
 }
 
-export class CSharpTarget extends CompileTarget<{ CSharp_Namespace: string }> {
+export class CSharpTarget extends CompileTarget<{ csharp_namespace: string }> {
    name: string = "c#";
 
    get namespace() {
-      return this.options.CSharp_Namespace || "JRPC";
+      return this.options.csharp_namespace || "JRPC";
    }
 
    start(): void {