# System.Runtime.InteropServices

``` diff
 namespace System.Runtime.InteropServices {
     public enum Architecture {
+        S390x = 5,
     }
     public static class MemoryMarshal {
+        public static ref byte GetArrayDataReference(Array array);
     }
+    public sealed class UnmanagedCallConvAttribute : Attribute {
+        public Type[] CallConvs;
+        public UnmanagedCallConvAttribute();
+    }
 }
```

