public new string ToString()
        {
            Debug.Assert(this.compositeContinuationTokens != null);
            if (this.compositeContinuationTokens == null)
            {
                return(null);
            }

            return(StandByFeedContinuationToken.SerializeTokens(this.compositeContinuationTokens));
        }
 public static string CreateForRange(
     string containerRid,
     string minInclusive,
     string maxExclusive)
 {
     if (string.IsNullOrWhiteSpace(containerRid))
     {
         throw new ArgumentNullException(nameof(containerRid));
     }
     // MinInclusive can be an empty string
     if (minInclusive == null)
     {
         throw new ArgumentNullException(nameof(minInclusive));
     }
     if (string.IsNullOrWhiteSpace(maxExclusive))
     {
         throw new ArgumentNullException(nameof(maxExclusive));
     }
     return(StandByFeedContinuationToken.SerializeTokens(new CompositeContinuationToken[1] {
         StandByFeedContinuationToken.CreateCompositeContinuationTokenForRange(minInclusive, maxExclusive, null)
     }));
 }