Gets and sets the property CallerReference. A unique number that ensures the request can't be replayed. If the CallerReference is new (no matter the content of the StreamingDistributionConfig object), a new streaming distribution is created. If the CallerReference is a value you already sent in a previous request to create a streaming distribution, and the content of the StreamingDistributionConfig is identical to the original request (ignoring white space), the response includes the same information returned to the original request. If the CallerReference is a value you already sent in a previous request to create a streaming distribution but the content of the StreamingDistributionConfig is different from the original request, CloudFront returns a DistributionAlreadyExists error.

public string CallerReference { get; set; }