diff --git a/src/Common/TypeExtensions.cs b/src/Common/TypeExtensions.cs
index 45094fffce..027b4a75b4 100644
--- a/src/Common/TypeExtensions.cs
+++ b/src/Common/TypeExtensions.cs
@@ -52,7 +52,9 @@ namespace Microsoft.AspNet.Mvc
         {
             return type.GetTypeInfo().ImplementedInterfaces.ToArray();
         }
+#endif
 
+#if NETFX_CORE || K10
         public static bool IsAssignableFrom([NotNull] this Type type, [NotNull] Type c)
         {
             return type.GetTypeInfo().IsAssignableFrom(c.GetTypeInfo());
@@ -61,17 +63,29 @@ namespace Microsoft.AspNet.Mvc
 
         public static bool IsGenericType([NotNull] this Type type)
         {
+#if NETFX_CORE || K10
             return type.GetTypeInfo().IsGenericType;
+#else
+            return type.IsGenericType;
+#endif
         }
 
         public static bool IsInterface([NotNull] this Type type)
         {
+#if NETFX_CORE || K10
             return type.GetTypeInfo().IsInterface;
+#else
+            return type.IsInterface;
+#endif
         }
 
         public static bool IsValueType([NotNull] this Type type)
         {
+#if NETFX_CORE || K10
             return type.GetTypeInfo().IsValueType;
+#else
+            return type.IsValueType;
+#endif
         }
 
         public static bool IsCompatibleWith([NotNull] this Type type, object value)
@@ -92,6 +106,8 @@ namespace Microsoft.AspNet.Mvc
 
         public static bool HasStringConverter([NotNull] this Type type)
         {
+            // TODO: This depends on TypeConverter which does not exist in the CoreCLR.
+            // return TypeDescriptor.GetConverter(type).CanConvertFrom(typeof(string));
             TypeInfo typeInfo = type.GetTypeInfo();
             if (typeInfo.IsPrimitive || type == typeof(string))
             {
@@ -102,7 +118,6 @@ namespace Microsoft.AspNet.Mvc
                 // Nullable<T> where T is a primitive type or has a type converter
                 return true;
             }
-
             return false;
         }