/// <summary>
        /// Initializes a new instance of the <see cref="ObjectContent"/> class.
        /// </summary>
        /// <param name="type">The type of object this instance will contain.</param>
        /// <param name="value">The value of the object this instance will contain.</param>
        /// <param name="formatter">The formatter to use when serializing the value.</param>
        /// <param name="mediaType">The media type to associate with this object.</param>
        public ObjectContent(Type type, object value, MediaTypeFormatter formatter, string mediaType)
        {
            if (type == null)
            {
                throw new ArgumentNullException("type");
            }
            if (formatter == null)
            {
                throw new ArgumentNullException("formatter");
            }

            _formatter = formatter;
            ObjectType = type;

            VerifyAndSetObject(value);
            _formatter.SetDefaultContentHeaders(type, Headers, mediaType);
        }
        /// <summary>
        /// Initializes a new instance of the <see cref="ObjectContent"/> class.
        /// </summary>
        /// <param name="type">The type of object this instance will contain.</param>
        /// <param name="value">The value of the object this instance will contain.</param>
        /// <param name="formatter">The formatter to use when serializing the value.</param>
        /// <param name="mediaType">The authoritative value of the content's Content-Type header. Can be <c>null</c> in which case the
        /// <paramref name="formatter">formatter's</paramref> default content type will be used.</param>
        public ObjectContent(Type type, object value, MediaTypeFormatter formatter, MediaTypeHeaderValue mediaType)
        {
            if (type == null)
            {
                throw Error.ArgumentNull("type");
            }
            if (formatter == null)
            {
                throw Error.ArgumentNull("formatter");
            }

            if (!formatter.CanWriteType(type))
            {
                throw Error.InvalidOperation(Properties.Resources.ObjectContent_FormatterCannotWriteType, formatter.GetType().FullName, type.Name);
            }

            _formatter = formatter;
            ObjectType = type;

            VerifyAndSetObject(value);
            _formatter.SetDefaultContentHeaders(type, Headers, mediaType);
        }