diff --git a/CSharp/Libraries/UniversalEditor.Core/IO/Writer.cs b/CSharp/Libraries/UniversalEditor.Core/IO/Writer.cs
index 3bfc6784..06c0fa0b 100644
--- a/CSharp/Libraries/UniversalEditor.Core/IO/Writer.cs
+++ b/CSharp/Libraries/UniversalEditor.Core/IO/Writer.cs
@@ -95,6 +95,7 @@ namespace UniversalEditor.IO
         }
         public void WriteBytes(byte[] data)
         {
+            if (data == null) return;
             Write(data, 0, data.Length);
         }