The value of CacheData is inherited from the object that created the DB2Blob instance (for example, a Devart.Data.DB2.DB2DataReader instance).
This property needs to be set before the first retrieval of data from this object, or the data will not be cached.
If the CacheData property is false, applications can only retrieve the complete set of data from a DB2Blob instance once (by any of the ways): via the GetBytes method, Value property, or the ToString method. Tying to retrieve the current instance data again by any of the means results in System.InvalidOperationException.