Is a PropertyInfo a static property?

gistfile1.cs

        public static bool IsStatic(this PropertyInfo propertyInfo)
        {
            return ((propertyInfo.CanRead && propertyInfo.GetMethod.IsStatic) ||
                (propertyInfo.CanWrite && propertyInfo.SetMethod.IsStatic));
        }

// So a replacement for getting private and public non-static properties in a type...
        public static bool IsStatic(this PropertyInfo propertyInfo)
        {
            return ((propertyInfo.CanRead && propertyInfo.GetMethod.IsStatic) ||
                (propertyInfo.CanWrite && propertyInfo.SetMethod.IsStatic));
        }

        public static PropertyInfo[] GetPublicAndNonPublicInstanceProperties(this Type type)
        {
            var list = new List<PropertyInfo>();

            var props = type.GetTypeInfo().DeclaredProperties;
            foreach (var prop in props)
            {
                if (!prop.IsStatic())
                {
                    list.Add(prop);
                }
            }

            return list.ToArray();
        }