/// <summary>
            /// Determines if the property or field should not be serialized.
            /// </summary>
            /// <param name="objType"></param>
            /// <param name="member"></param>
            /// <param name="value"></param>
            /// <returns></returns>
            /// <remarks>
            /// Checks these in order, if any returns true then this is true:
            /// - is flagged with the JsonIgnoreAttribute property
            /// - has a JsonSpecifiedProperty which returns false
            /// </remarks>
            private bool IsIgnored(Type objType, MemberInfo member, object obj)
            {
                if (JsonIgnoreAttribute.IsJsonIgnore(member))
                {
                    return(true);
                }

                string specifiedProperty = JsonSpecifiedPropertyAttribute.GetJsonSpecifiedProperty(member);

                if (!String.IsNullOrEmpty(specifiedProperty))
                {
                    PropertyInfo specProp = objType.GetProperty(specifiedProperty);
                    if (specProp != null)
                    {
                        object isSpecified = specProp.GetValue(obj, null);
                        if (isSpecified is Boolean && !Convert.ToBoolean(isSpecified))
                        {
                            return(true);
                        }
                    }
                }

                if (this.settings.UseXmlSerializationAttributes)
                {
                    if (JsonIgnoreAttribute.IsXmlIgnore(member))
                    {
                        return(true);
                    }

                    PropertyInfo specProp = objType.GetProperty(member.Name + "Specified");
                    if (specProp != null)
                    {
                        object isSpecified = specProp.GetValue(obj, null);
                        if (isSpecified is Boolean && !Convert.ToBoolean(isSpecified))
                        {
                            return(true);
                        }
                    }
                }

                return(false);
            }
        private bool IsIgnored(Type objType, MemberInfo member, object obj)
        {
            if (JsonIgnoreAttribute.IsJsonIgnore(member))
            {
                return(true);
            }

            var jsonSpecifiedProperty = JsonSpecifiedPropertyAttribute.GetJsonSpecifiedProperty(member);

            if (!string.IsNullOrEmpty(jsonSpecifiedProperty))
            {
                PropertyInfo property = objType.GetProperty(jsonSpecifiedProperty);
                if (property != null)
                {
                    object value = property.GetValue(obj, null);
                    if (value is bool && !Convert.ToBoolean(value))
                    {
                        return(true);
                    }
                }
            }
            if (Settings.UseXmlSerializationAttributes)
            {
                if (JsonIgnoreAttribute.IsXmlIgnore(member))
                {
                    return(true);
                }
                PropertyInfo property2 = objType.GetProperty(member.Name + "Specified");
                if (property2 != null)
                {
                    object value2 = property2.GetValue(obj, null);
                    if (value2 is bool && !Convert.ToBoolean(value2))
                    {
                        return(true);
                    }
                }
            }
            return(false);
        }
            private Dictionary <string, MemberInfo> CreateMemberMap(Type objectType)
            {
                if (this.MemberMapCache.ContainsKey(objectType))
                {
                    // map was stored in cache
                    return(this.MemberMapCache[objectType]);
                }

                // create a new map
                Dictionary <string, MemberInfo> memberMap = new Dictionary <string, MemberInfo>();

                // load properties into property map
                PropertyInfo[] properties = objectType.GetProperties();
                foreach (PropertyInfo info in properties)
                {
                    if (!info.CanRead || !info.CanWrite)
                    {
                        continue;
                    }

                    if (JsonIgnoreAttribute.IsJsonIgnore(info))
                    {
                        continue;
                    }

                    string jsonName = JsonNameAttribute.GetJsonName(info);
                    if (String.IsNullOrEmpty(jsonName))
                    {
                        memberMap[info.Name] = info;
                    }
                    else
                    {
                        memberMap[jsonName] = info;
                    }
                }

                // load public fields into property map
                FieldInfo[] fields = objectType.GetFields();
                foreach (FieldInfo info in fields)
                {
                    if (!info.IsPublic)
                    {
                        continue;
                    }

                    if (JsonIgnoreAttribute.IsJsonIgnore(info))
                    {
                        continue;
                    }

                    string jsonName = JsonNameAttribute.GetJsonName(info);
                    if (String.IsNullOrEmpty(jsonName))
                    {
                        memberMap[info.Name] = info;
                    }
                    else
                    {
                        memberMap[jsonName] = info;
                    }
                }

                // store in cache for repeated usage
                this.MemberMapCache[objectType] = memberMap;

                return(memberMap);
            }