System.Net.Http.Headers.MediaTypeHeaderValue.CheckMediaTypeFormat C# (CSharp) Method

        private static void CheckMediaTypeFormat(string mediaType, string parameterName)
        {
            if (string.IsNullOrEmpty(mediaType))
            {
                throw new ArgumentException(SR.net_http_argument_empty_string, parameterName);
            }

            // When adding values using strongly typed objects, no leading/trailing LWS (whitespace) are allowed.
            // Also no LWS between type and subtype are allowed.
            string tempMediaType;
            int mediaTypeLength = GetMediaTypeExpressionLength(mediaType, 0, out tempMediaType);
            if ((mediaTypeLength == 0) || (tempMediaType.Length != mediaType.Length))
            {
                throw new FormatException(string.Format(System.Globalization.CultureInfo.InvariantCulture, SR.net_http_headers_invalid_value, mediaType));
            }
        }