# System.Runtime.CompilerServices

``` diff
 namespace System.Runtime.CompilerServices {
+    public sealed class DisableRuntimeMarshallingAttribute : Attribute {
+        public DisableRuntimeMarshallingAttribute();
+    }
     public static class RuntimeHelpers {
+        public static ReadOnlySpan<T> CreateSpan<T>(RuntimeFieldHandle fldHandle);
     }
 }
```

