diff --git a/JSIL.Libraries/Includes/Bootstrap/Core/Classes/System.BitConverter.js b/JSIL.Libraries/Includes/Bootstrap/Core/Classes/System.BitConverter.js
index 7ad90c2aa..326c08abb 100644
--- a/JSIL.Libraries/Includes/Bootstrap/Core/Classes/System.BitConverter.js
+++ b/JSIL.Libraries/Includes/Bootstrap/Core/Classes/System.BitConverter.js
@@ -301,6 +301,13 @@ JSIL.ImplementExternals("System.BitConverter", function ($) {
     (new JSIL.MethodSignature($.Double, [$jsilcore.TypeRef("System.Array", [$.Byte]), $.Int32], [])),
     $jsilcore.BytesToDouble
   );
+
+  $.Method({ Static: true, Public: true }, "DoubleToInt64Bits",
+    (new JSIL.MethodSignature($.Int64, [$.Double], [])),
+    function DoubleToInt64Bits(double) {
+      return $jsilcore.BytesToInt64($jsilcore.BytesFromDouble(double));
+    }
+  );
 });
 
 //? if ('GENERATE_STUBS' in  __out) {
diff --git a/Proxies/Numbers.cs b/Proxies/Numbers.cs
index 1253aabf0..f026d0140 100644
--- a/Proxies/Numbers.cs
+++ b/Proxies/Numbers.cs
@@ -52,12 +52,12 @@ public string ToString () {
             throw new InvalidOperationException();
         }
 
-        [JSReplacement("JSIL.NumberToFormattedString($this, null, $format)")]
+        [JSReplacement("$typeof(this).__PublicInterface__.$$ToString($this, $format, null)")]
         public string ToString (string format) {
             throw new InvalidOperationException();
         }
 
-        [JSReplacement("JSIL.NumberToFormattedString($this, null, $format, $formatProvider)")]
+        [JSReplacement("$typeof(this).__PublicInterface__.$$ToString($this, $format, $formatProvider)")]
         public string ToString (string format, IFormatProvider formatProvider) {
             throw new InvalidOperationException();
         }