-Fixed allowing static Specified properties

Src/Newtonsoft.Json.Tests/Serialization/ContractResolverTests.cs

@@ -701,11 +701,14 @@ namespace Newtonsoft.Json.Tests.Serialization
             public string Prop3 { get; set; }
             [JsonProperty]
             public string Prop4 { get; set; }
+            [JsonProperty]
+            public string Prop5 { get; set; }
 
             public bool Prop1Specified;
             public bool Prop2Specified { get; set; }
             public static bool Prop3Specified { get; set; }
             public event System.Func<bool> Prop4Specified;
+            public static bool Prop5Specified;
 
             protected virtual bool OnProp4Specified()
             {
@@ -736,6 +739,10 @@ namespace Newtonsoft.Json.Tests.Serialization
             var property4 = contract.Properties["Prop4"];
             Assert.AreEqual(null, property4.GetIsSpecified);
             Assert.AreEqual(null, property4.SetIsSpecified);
+
+            var property5 = contract.Properties["Prop5"];
+            Assert.AreEqual(null, property5.GetIsSpecified);
+            Assert.AreEqual(null, property5.SetIsSpecified);
         }
 
         [Test]
@@ -760,6 +767,10 @@ namespace Newtonsoft.Json.Tests.Serialization
             var property4 = contract.Properties["Prop4"];
             Assert.AreEqual(null, property4.GetIsSpecified);
             Assert.AreEqual(null, property4.SetIsSpecified);
+
+            var property5 = contract.Properties["Prop5"];
+            Assert.AreEqual(null, property5.GetIsSpecified);
+            Assert.AreEqual(null, property5.SetIsSpecified);
         }
     }
 }

Src/Newtonsoft.Json/Serialization/DefaultContractResolver.cs

@@ -1602,10 +1602,10 @@ namespace Newtonsoft.Json.Serialization
 
         private void SetIsSpecifiedActions(JsonProperty property, MemberInfo member, bool allowNonPublicAccess)
         {
-            MemberInfo specifiedMember = member.DeclaringType.GetProperty(member.Name + JsonTypeReflector.SpecifiedPostfix);
+            MemberInfo specifiedMember = member.DeclaringType.GetProperty(member.Name + JsonTypeReflector.SpecifiedPostfix, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
             if (specifiedMember == null)
             {
-                specifiedMember = member.DeclaringType.GetField(member.Name + JsonTypeReflector.SpecifiedPostfix);
+                specifiedMember = member.DeclaringType.GetField(member.Name + JsonTypeReflector.SpecifiedPostfix, BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic);
             }
 
             if (specifiedMember == null || ReflectionUtils.GetMemberUnderlyingType(specifiedMember) != typeof(bool))

Src/Newtonsoft.Json/Utilities/TypeExtensions.cs

@@ -345,7 +345,13 @@ namespace Newtonsoft.Json.Utilities
 
         public static MemberInfo GetField(this Type type, string member, BindingFlags bindingFlags)
         {
-            return type.GetTypeInfo().GetDeclaredField(member);
+            MemberInfo field = type.GetTypeInfo().GetDeclaredField(member);
+            if (field == null || !TestAccessibility(field, bindingFlags))
+            {
+                return null;
+            }
+            
+            return field;
         }
 
         public static IEnumerable<PropertyInfo> GetProperties(this Type type, BindingFlags bindingFlags)
@@ -426,7 +432,13 @@ namespace Newtonsoft.Json.Utilities
 
         public static PropertyInfo GetProperty(this Type type, string name, BindingFlags bindingFlags)
         {
-            return type.GetTypeInfo().GetDeclaredProperty(name);
+            PropertyInfo property = type.GetTypeInfo().GetDeclaredProperty(name);
+            if (property == null || !TestAccessibility(property, bindingFlags))
+            {
+                return null;
+            }
+            
+            return property;
         }
 
         public static IEnumerable<FieldInfo> GetFields(this Type type)