# System.Runtime.InteropServices

``` diff
 namespace System.Runtime.InteropServices {
     public static class Marshal {
+        public static string PtrToStringUTF8(IntPtr ptr);
+        public static string PtrToStringUTF8(IntPtr ptr, int byteLen);
+        public static IntPtr StringToCoTaskMemUTF8(string s);
+        public static void ZeroFreeCoTaskMemUTF8(IntPtr s);
     }
     public enum UnmanagedType {
+        LPUTF8Str = 48,
     }
 }
```