1 files changed, 2 insertions, 0 deletions
diff --git a/src/main/java/org/zwobble/couscous/backends/csharp/CsharpSerializer.java b/src/main/java/org/zwobble/couscous/backends/csharp/CsharpSerializer.java
index 15751e9..13a4efa 100644
--- a/src/main/java/org/zwobble/couscous/backends/csharp/CsharpSerializer.java
+++ b/src/main/java/org/zwobble/couscous/backends/csharp/CsharpSerializer.java
@@ -305,6 +305,8 @@ public class CsharpSerializer implements NodeVisitor {
             if (!returnNode.getValue().getType().equals(Types.VOID)) {
                 writer.writeSpace();
                 write(returnNode.getValue());
+            } else if (!returnNode.getValue().equals(LiteralNode.UNIT)) {
+                throw new UnsupportedOperationException();
             }
             writer.writeSymbol(";");
         });