PhaseLogEntry is a class that encapsulates all the data we're writing in Phase Logging PhaseLogging is an activity that is done by the DataMigration tool to cope with the fact that phases of the process may be done by C#, but other phases (e.g. Sql Server - based PostProcessing modules) that will not be able to write to log4net. This will be consumed by IPhaseLogWriter implementations as a unified way to show what happened on a given run of the DataMigration tool.