ModifySnapshotRequestExpirationTime Property

Specify the time after which the snapshot can be removed. If neither 'expirationTime' nor 'retention' is specified for the original snapshot, the snapshot will be retained until manually deleted. The format is: ISO 8601 date string for time based expiration, otherwise it will not expire. 'null', or not specified, the snapshot is to be retained permanently. 'fifo' causes the snapshot to be preserved on a First-In-First-Out basis, relative to other FIFO snapshots on the volume. The API will fail if no FIFO space is available. Note: The 'retention' option is not supported by ModifySnapshot.

public string ExpirationTime { get; set; }