1 files changed, 15 insertions, 2 deletions
diff --git a/src/mscorlib/src/System/Enum.cs b/src/mscorlib/src/System/Enum.cs
index 25a4ff34d3..b5d00fe60e 100644
--- a/src/mscorlib/src/System/Enum.cs
+++ b/src/mscorlib/src/System/Enum.cs
@@ -12,6 +12,18 @@ using System.Runtime.Versioning;
 using System.Diagnostics;
 using System.Diagnostics.Contracts;
 
+// The code below includes partial support for float/double and
+// pointer sized enums.
+//
+// The type loader does not prohibit such enums, and older versions of
+// the ECMA spec include them as possible enum types.
+//
+// However there are many things broken throughout the stack for
+// float/double/intptr/uintptr enums. There was a conscious decision
+// made to not fix the whole stack to work well for them because of
+// the right behavior is often unclear, and it is hard to test and
+// very low value because of such enums cannot be expressed in C#.
+
 namespace System
 {
     [Serializable]
@@ -425,7 +437,7 @@ namespace System
             }
             if (firstNonWhitespaceIndex == -1)
             {
-                parseResult.SetFailure(ParseFailureKind.Argument, "Arg_MustContainEnumInfo", null);
+                parseResult.SetFailure(ParseFailureKind.Argument, nameof(SR.Arg_MustContainEnumInfo), null);
                 return false;
             }
 
@@ -506,7 +518,7 @@ namespace System
                 if (!success)
                 {
                     // Not found, throw an argument exception.
-                    parseResult.SetFailure(ParseFailureKind.ArgumentWithParameter, "Arg_EnumValueNotFound", value);
+                    parseResult.SetFailure(ParseFailureKind.ArgumentWithParameter, nameof(SR.Arg_EnumValueNotFound), value);
                     return false;
                 }
 
@@ -961,6 +973,7 @@ namespace System
             return ToString();
         }
 
+        [Intrinsic]
         public Boolean HasFlag(Enum flag)
         {
             if (flag == null)